STL


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
us-gaap:ConsolidatedEntities
us-gaap:CapitalToRiskWeightedAssets

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:LongtermDebtType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

us-gaap:InterestExpense

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:MarketingAndAdvertisingExpense

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:Assets
dei:LegalEntity, us-gaap:StatementScenario, us-gaap:SubsequentEventType
us-gaap:ConsolidatedEntities

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapital
us-gaap:ConsolidatedEntities
us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:ConsolidatedEntities
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:LongTermDebt
us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DepreciationDepletionAndAmortization

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType

us-gaap:DeferredTaxLiabilities

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions

stl:AccountsReceivableManagementFeesFactoringCommissionsAndOtherRelatedFees

stl:AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit

stl:AccretionAmortizationofDiscountsandPremiumsLoans

stl:ChargeOffsFromTroubledDebtRestructurings

stl:ConsumerLoanServicing

stl:DebtAndEquitySecuritiesCalledGainLoss

stl:DebtAndEquitySecuritiesRealizedGainLossSales

stl:DebtSecuritiesAvailableForSaleRealizedGainFromCalls

stl:DebtSecuritiesAvailableForSaleRealizedGainLossSecuritiesCalled

stl:DebtSecuritiesAvailableForSaleRealizedLossFromCalls

stl:DebtSecuritiesHeldToMaturityRealizedGainLossSecuritiesCalled

stl:DebtSecuritiesHeldToMaturitySoldRealizedGain

stl:DebtSecuritiesHeldToMaturitySoldRealizedLoss

stl:EffectiveIncomeTaxRateReconciliationFDICInsurancePremiumLimitation

stl:EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmortizationExpenseAmount

stl:EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmount

stl:EffectiveIncomeTaxRateReconciliationTaxExpenseBenefitCARESActNetOperatingLossCarryback

stl:EffectiveIncomeTaxReconciliationNondeductibleExpenseRestrictedStockVestingSection162mLimitation

stl:EffectiveIncomeTaxReconciliationUncertainTaxPositionsAmount

stl:EmployeeStockOwnershipPlanESOPAndStockBasedCompensationExpense

stl:FeesAndCommissionsLoans
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
stl:FinancingReceivableAllowanceForCreditLossSold

stl:FinancingReceivableAllowanceForCreditLossTroubledDebtRestructuringsDefaults

stl:FinancingReceivableInterestAndFeeIncome
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementLocation
stl:FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:IncomeStatementLocation
us-gaap:IncomeStatementLocation
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementLocation

stl:IncomeTaxReconciliationBankOwnedLifeInsuranceIncome

stl:InsuranceandSuretyBondPremiumExpense
dei:LegalEntity, us-gaap:SubsequentEventType
stl:MergerPercentageOfOwnershipAfterTransaction

stl:MergerRelatedExpense
us-gaap:StatementScenario
stl:MergerTerminationFee

stl:NetChargeOffsToAverageGrossLoansAnnualized

stl:OperatingLeaseDepreciationExpense

stl:OperationalLoss

stl:OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldToMaturityArisingDuringPeriodbeforeTax

stl:OtherNoninterestExpenseMiscellaneous

stl:OtherRealEstateOwnedIncomeExpenseNet

stl:PaymentsForLoanOriginations

stl:PaymentsOfShortTermFHLBankBorrowingsFinancingActivities

stl:PaymentstoAcquireAffordableHousingTaxCredit

stl:PortfolioLoansRepaymentsOriginationsNet

stl:ProceedsFromCallsOfAvailableForSaleSecurities

stl:ProceedsFromCallsOfHeldToMaturitySecurities

stl:ProceedsFromMaturitiesAndPrepaymentsOfDebtSecuritiesAvailableForSale

stl:ProceedsFromMaturitiesAndPrepaymentsOfHeldToMaturitySecurities

stl:ResidentialLoanServicing

stl:ResidentialMortgageLoanServicing
us-gaap:AwardType, us-gaap:PlanName
stl:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpirationsWeightedAverageGrantDateFairValue

stl:TaxExpenseBenefitOfSecuritiesCallsNetGains

stl:TaxExpenseBenefitOfSecuritiesGains

stl:TaxExpenseHeldToMaturitySecurityGains

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:AdjustmentsToAdditionalPaidInCapitalOther

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions
us-gaap:StatementEquityComponents

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AssetImpairmentCharges

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:Communication

us-gaap:DebtAndEquitySecuritiesGainLoss

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss
us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:VariableRate
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal
us-gaap:FinancialInstrument

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1

us-gaap:FinancingReceivableReclassificationToHeldForSale

us-gaap:FinancingReceivableSignificantSales
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem
us-gaap:GainLossOnSaleOfNotesReceivable

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnTerminationOfLease

us-gaap:GainsLossesOnSalesOfOtherRealEstate

us-gaap:HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInTimeDeposits

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions

us-gaap:LaborAndRelatedExpense

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue

us-gaap:NetChangeInterestAndNoninterestBearingDepositsDomestic

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOther

us-gaap:OccupancyNet

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossTax
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherNoninterestExpense

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForProceedsFromDepositOnLoan

us-gaap:PaymentsForProceedsFromFederalHomeLoanBankStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PreferredStockDividendsAndOtherAdjustments

us-gaap:ProceedsFromCollectionOfFinanceReceivables

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ProceedsFromSaleOfLoansHeldForInvestment

us-gaap:ProceedsFromSaleOfLoansHeldForSale

us-gaap:ProceedsFromSaleOfOtherRealEstate

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanLossesExpensed
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfSeniorDebt
us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfSubordinatedDebt

us-gaap:RestrictedStockExpense

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
us-gaap:AwardType

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementEquityComponents

us-gaap:TransferOfLoansHeldForSaleToPortfolioLoans1

us-gaap:TransferToOtherRealEstate

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:FairValueByFairValueHierarchyLevel
stl:AccruedInterestPayableBorrowingsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel
stl:AccruedInterestPayableDepositsIncludingEscrowFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel
stl:AccruedInterestReceivablesLoansFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel
stl:AccruedInterestReceivablesSecuritiesFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:RetirementPlanType
stl:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax

stl:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAccumulatedAmortization

stl:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsGross

stl:BankOwnedLifeInsuranceIncludingClaimsStabilizationReserves
us-gaap:ConsolidatedEntities
stl:CapitalRequiredForCapitalAdequacyFullyPhasedIn
us-gaap:ConsolidatedEntities
stl:CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn

stl:CashOnDepositAsSwapCollateralAndSettlement

stl:CertificatesOfDeposit
us-gaap:FairValueByFairValueHierarchyLevel
stl:CertificatesOfDepositFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

stl:DeferredLoanFeeandCost

stl:DeferredTaxAssetsOperatingLeaseLiability

stl:DeferredTaxAssetsPurchaseAccountingAdjustments

stl:DeferredTaxLiabilitiesAcquisitions

stl:DeferredTaxLiabilitiesPurchaseAccountingFairValueAdjustments

stl:DeferredTaxLiabilityLeasesRightOfUseAsset

stl:Deferredtaxassetsdeferredrent

stl:Deferredtaxliabilityprepaidpensioncost
us-gaap:FinancialInstrument
stl:FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyCashasCollateral
us-gaap:FinancialInstrument
stl:FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyOtherCollateral
us-gaap:UnusualOrInfrequentItem
stl:FinancingReceivableAllowanceForCreditLossAsAPercentOfFinancingReceivable

stl:FinancingReceivableBeforeAllowanceForCreditLossCollateralDependentAssessmentThreshold
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:UnusualOrInfrequentItem
stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:UnusualOrInfrequentItem
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:UnusualOrInfrequentItem
us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:UnusualOrInfrequentItem
us-gaap:UnusualOrInfrequentItem
us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem
stl:FinancingReceivableUnpaidBalanceOfLoansSold

stl:HeldToMaturitySecuritiesAfterAllowanceForCreditLoss
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
stl:ImpairedLoansMeasurementInput
us-gaap:Range, stl:LoanStatus, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:MeasurementInputType
us-gaap:ConsolidatedEntities
stl:LiquidationAccount

stl:LongTermDebtMaturitiesWeightedAverageInterestRateInNextRollingTwelveMonths

stl:LongTermDebtMaturitiesWeightedAverageInterestRateInRollingAfterYearFive

stl:LongTermDebtMaturitiesWeightedAverageInterestRateInRollingYearTwo

stl:MarketValueOfMortgageNotRequiredToBePledged
us-gaap:SubsequentEventType
stl:MergerSharesReceivedPerCommonStockOwned

stl:MinimumLoanBalanceforCreditRisktobeEvaluatedonaHomogeneousBasis
us-gaap:FairValueByFairValueHierarchyLevel
stl:MortgageEscrowFundsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

stl:MunicipalDeposits
us-gaap:CreditLossStatus
stl:NonAccrualLoansUnderTroubledDebtRestructurings
us-gaap:CreditLossStatus, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:CreditLossStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FairValueByFairValueHierarchyLevel
stl:NonMaturityDepositsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:InternalCreditAssessment
stl:NonPerformingLoans
us-gaap:InternalCreditAssessment
stl:NonPerformingLoansTotal

stl:OtherAssetsOther

stl:OtherComprehensiveIncomesecurities

stl:OtherLiabilitiesOther

stl:PayrollFinanceAndFactoringLiabilities
us-gaap:ConsolidatedEntities
stl:ReconciliationOfStockholdersEquityToRegulatoryCapitalReconcilingItemsIntangibleAssetsIncludingGoodwill
us-gaap:ConsolidatedEntities
stl:StockholdersEquityAttributableToParentExcludingPreferredStock
us-gaap:ConsolidatedEntities, us-gaap:CumulativeEffectPeriodOfAdoption
us-gaap:ConsolidatedEntities
stl:TierOneCommonCapitalRequiredForCapitalAdequacyFullyPhasedIn
us-gaap:ConsolidatedEntities
stl:TierOneCommonCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn
us-gaap:ConsolidatedEntities
stl:TierOneCommonCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
us-gaap:ConsolidatedEntities
stl:TierOneLeverageCapitalRequiredForCapitalAdequacyFullyPhasedIn
us-gaap:ConsolidatedEntities
stl:TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsFullyPhasedIn
us-gaap:ConsolidatedEntities
stl:TierOneRiskBasedCapitalRequiredForCapitalAdequacyFullyPhasedIn
us-gaap:ConsolidatedEntities
stl:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn

stl:TroubleDebtrestructuringcurrentloans
us-gaap:CreditLossStatus
us-gaap:CreditLossStatus, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:CreditLossStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:RetirementPlanType
us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AdvancePaymentsByBorrowersForTaxesAndInsurance

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestments
us-gaap:StatementEquityComponents
us-gaap:AociBeforeTaxAttributableToParent

us-gaap:AociTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
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us-gaap:TimeDeposits

us-gaap:UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Allocated Share Based Compensation Expense
Balance Sheet
Intangible Assets Net Excluding Goodwill
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
NonCurrent Assets
Intangible Assets Net Excluding Goodwill
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Derivative Liabilities
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Gain Loss On Sale Of Property Plant Equipment
NetCashProvidedByUsedInInvestingActivities
Payments To Acquire Property Plant And Equipment
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
DividendsAndRepurchase
Payments For Repurchase Of Common Stock
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Net
BanksAndOrInsurance
Securities Sold Under Agreements To Repurchase
AssetsBanks
Property Plant And Equipment Net
LiabilitiesBanks
Deposits

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue ███████████████▅▅▅▅▄▄▄▄▄▄▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁2.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2991.4111.4111.4111.4111.3671.3671.3671.3671.3671.3670.9810.9120.9120.9120.9120.9120.5220.5220.5220.5220.5220.4590.4590.4590.4590.459NANA0.459NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█192.292989192.621907NA193.715943193.604431196.709038NA203.566582207.376239213.505842NA225.622895225.621856225.264147NA135.95016135.922897135.811721NA130.875614130.688729130.500975NA129.63185891.02171688.25276884.19491683.37846283.80613583.79410770.493305NA43.90615843.84848643.721091NA37.33046737.31677837.252464NA37.37021337.49746737.552245NA38.086579
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▁█191.436885191.890512NA193.494929193.479757196.344061NA203.090365206.932114213.15709NA225.088511225.084232224.730686NA135.346791135.317866135.163347NA130.239193130.081465129.974025NA129.17283291.02171687.83902983.8313883.10594483.5800583.49776570.493305NA43.80186743.7436443.637315NA37.30269337.28065137.252464NA37.36839137.49639537.552245NA38.086535
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA0.0NA0.3593040.3050140.02359NA0.00.00.0NA0.00.00.0NA0.00.00.0NA0.00.00.0NA0.0001490.1175370.1128910.0826250.5305470.562810.6531462.025501NA1.254124161.3326191.358812NA1.7641541.7109431.93583NA1.862328NANANANA
us-gaap:EarningsPerShareBasic ▇▇▆▇▅▃▇█▇▇▇▇▇▇▁▆▆▅▆▅▅▄▅▄▂▄▅▅▄▄▁▄▄▄▄▃▄▄▄▃▃▄▄▄▄0.50.510.390.430.250.060.520.590.460.470.510.520.50.43-0.160.330.310.290.310.290.290.180.250.19-0.080.190.20.20.180.12-0.20.120.150.150.160.060.170.150.15-0.010.050.10.180.150000000000000020.12
us-gaap:EarningsPerShareDiluted ▇▇▆▇▅▃▇█▇▇▇▇▇▇▁▆▆▅▆▅▅▄▅▄▂▄▅▄▄▄▁▄▄▄▄▃▄▄▄▃▃▄▄▄▄0.50.50.380.430.250.060.520.590.460.470.510.520.50.43-0.160.330.310.290.310.290.290.180.250.19-0.080.190.20.190.180.12-0.20.120.150.150.160.060.170.150.15-0.010.050.10.180.150000000000000020.12
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompany██▇▇▁▁▁▁▁▁▁▁▁1.3019999999999999e-051.2529999999999999e-051.196e-051.175e-051.157e-071.147e-071.165e-071.235e-071.215e-071.2629999999999999e-071.2950000000000001e-071.364e-071.298e-07NA1.307e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:Subsidiaries██▇▇▁▁▁▁▁▁▁▁▁1.4439999999999999e-051.404e-051.338e-051.239e-051.2239999999999998e-071.219e-071.232e-071.273e-071.2670000000000002e-071.313e-071.3550000000000002e-071.423e-071.371e-07NA1.3950000000000002e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompany███▇▁▁▁▁▁▁▁▁▁1.592e-051.582e-051.5199999999999998e-051.417e-051.4199999999999997e-071.3730000000000002e-071.389e-071.349e-071.33e-071.378e-071.406e-071.474e-071.406e-07NA1.418e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:Subsidiaries███▇▁▁▁▁▁▁▁▁▁1.522e-051.542e-051.4730000000000001e-051.386e-051.385e-071.3800000000000002e-071.352e-071.399e-071.394e-071.441e-071.48e-071.55e-071.494e-07NA1.5210000000000002e-07NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AllocatedShareBasedCompensationExpense ██▆▇▇▇▆▆▆▆▅▄▄▄▃▃▃▃▂▃▃▂▂▂▂▂▂▂▂▂▂▁▁▂▁▁▁▁▁▁▁▁▁▁▁6.7816.6175.2225.8685.9136.0065.184.5654.6055.1233.683.1153.3362.8542.5081.9691.8971.7361.5571.6741.7471.541.041.0641.1271.1091.1440.8240.780.9270.9910.5130.5470.6790.50.3020.3260.2840.2750.3030.2840.2960.2790.3380.172
us-gaap:ComprehensiveIncomeNetOfTax ▆▅▅▅▅▄▆▇▇██▆▆▄▁▄▄▄▃▄▄▄▃▄▂▃▃▃▃▃▂▃▂▃▃▃▃▃▃▃▃▃▂▃▃109.64771.92573.37383.66371.78141.552101.779127.235143.416160.772167.221100.55693.70451.123-45.79547.56149.75341.9816.48634.38544.54140.04921.49336.57-16.10822.2918.21212.6521.52415.573-18.1377.656-12.22.7834.7862.4776.9073.9948.2735.41711.2533.807-8.7266.92610.963
us-gaap:GainsLossesOnExtinguishmentOfDebt -1.243NANA-6.241-9.723-0.7440.00.00.00.0460.1720.00.00.00.00.00.00.00.0-1.0130.0-8.7160.00.0NANA0.00.0NANA0.00.0NANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType us-gaap:FederalHomeLoanBankAdvancesNANA-2.749-6.237-9.723-0.753NANA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▇▇▆▆▄▂▇█▇▇███▇▂▄▄▄▄▄▄▃▄▃▁▃▃▃▃▂▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂122.862122.10594.97496.68757.9026.105134.603154.996120.457129.911144.925146.821146.156128.328-4.9666.44462.71956.77660.73354.41356.18236.00948.58335.841-11.32824.85625.3822.78921.06814.92-20.958.6419.2098.73210.0861.9818.5877.7367.743-1.3191.7524.4159.6987.4185.988
us-gaap:IncomeTaxExpenseBenefit ▇▆▆▅▄▁▇█▇▇█▇█▇▇▆▆▅▆▅▆▄▅▄▂▄▄▃▃▃▁▃▃▃▃▂▃▃▃▂▂▃▃▃▃24.52322.95518.55112.287.11-8.04227.90532.54923.99728.47430.43427.17131.91529.45628.31921.59220.31917.70919.73716.99118.41212.24315.79211.648-3.6828.0788.3766.4526.0574.588-6.9483.3122.8332.2033.066-0.282.3782.0352.026-0.826-0.1870.8422.9782.0151.232
us-gaap:IncomeTaxesPaid ▂▂▁▁▂▂▄▆▄▁▂▂▂▃▁█▄▁▇▂▁▄▂▁▃▄▃▂▁▂▂▁▁▂▁▁▁▁▁▁▁▂▁▂9.135.3160.9642.3788.3395.67817.428.8516.1040.0148.926.8236.9759.6472.0544.74520.0952.78539.0247.7710.9317.1798.3250.013.18217.80812.4733.7630.044.0194.651-0.2250.0974.4860.1170.2290.0691.5390.0362.0362.2244.7740.0363.111NA
us-gaap:InterestExpense ▂▂▃▃▅▇▇████▇▆▅▅▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁11.78315.93320.58426.83439.92761.75567.21771.88870.61873.89470.32665.07658.6946.97642.47125.61921.00517.2115.82715.03113.92912.49610.8039.9448.3737.8057.857.4767.317.2976.8355.7954.2764.6015.2224.8744.2634.5064.935.0265.135.2925.8766.0056.21
us-gaap:InterestIncomeExpenseNet ▇▇▇▇▇▇▇▇███████▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁218.527217.914222.026217.824213.299211.772228.257223.321231.839235.506242.871243.949246.216234.37234.024120.073113.258108.79107.248103.13100.3893.5195.42193.35463.57458.86760.23759.63358.45154.02845.87628.10828.31727.81927.92325.23924.08223.90523.23822.79122.80422.51123.18423.31624.198
us-gaap:InterestPaidNet ▂▁▃▂▅▆█▇███▇▆▄▆▂20.6019.59525.43823.40551.01758.80372.81767.51574.30869.93571.50165.30758.12941.8757.03422.655NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MarketingAndAdvertisingExpense ▄▄▆▃▂▄█▆▃▂▄▂▃▃▄▁▂▁▁▁▂▁▁▁▁1.961.7082.6761.2911.141.9833.5692.5141.3840.9911.9681.1471.2721.5431.6480.6490.8340.5510.6750.7370.9850.5510.7510.6990.596NA0.7820.6640.9630.4220.3090.4160.3070.5350.2440.3690.440.4270.6130.6770.8550.8430.9530.6751.041
us-gaap:NetIncomeLoss ▇▇▆▆▅▃▇█▇▇███▇▁▅▄▄▄▄▄▄▄▄▂▃▃▃▃▃▂▃▃▃▃▃▃▃▃▂▃▃▃▃▃98.33999.1576.42384.40750.79214.147106.698122.44796.46101.437114.491119.65114.24198.872-33.27944.85242.439.06740.99637.42237.7723.76632.79124.193-7.64616.77817.00416.33715.01110.332-14.0025.3296.3766.5297.022.2616.2095.7015.717-0.4931.9393.5736.725.4034.756
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▇▇▆▆▅▃▇█▇▇███▇▁▅▄▄▄▄▄▄▄▄▂96.3897.18774.45782.43848.8212.171104.722120.46594.47399.448112.501117.657112.24596.873-35.28144.85242.439.06740.99637.42237.7723.78433.03924.088-7.608NANA16.23914.919NANANANANANANANANANANANANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax NANA-3.05-0.74420.98927.405-4.9184.78846.95659.33552.73-19.094-20.537-47.749-12.5072.7097.3532.914-34.528-3.0376.77116.283-11.29912.377-8.4625.5121.208-3.6876.5135.241-4.1352.327-18.576-3.746-2.2340.2160.698-1.7072.5565.919.314NANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:FinancialInstrument,us-gaap:StatementEquityComponents us-gaap:AvailableforsaleSecurities,us-gaap:AccumulatedNetUnrealizedInvestmentGainLossNANA-3.145-1.40320.89167.249-5.25416.06746.82-19.57740.332-19.557NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:FinancialInstrument,us-gaap:StatementEquityComponents us-gaap:HeldtomaturitySecurities,us-gaap:AccumulatedNetUnrealizedInvestmentGainLossNANA0.0780.0950.043-0.4680.0850.0860.088-0.7970.1610.163NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedDefinedBenefitPlansAdjustmentNANA0.0170.5640.0550.840.251-11.3650.04813.76412.2370.30.042-0.901-0.475NANANANANA0.0260.2140.0175.380.0970.117-2.937-0.47-0.015-0.7481.4473.3911.53NANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncomeNANANA-0.74420.98927.405NA4.78846.95659.335NA-19.094-20.537-47.749-12.5072.7097.3532.914-34.528-3.0376.77116.283-11.29912.376-8.4625.5121.208-3.6876.5135.18-4.1352.327-18.576-3.746-2.2340.216NANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax █▇▆▆▅▇▇▇█▆▇▆███▁7.0966.5635.9755.965.3456.6226.5076.5827.0986.2126.5116.3336.9857.0037.2353.309NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ▇██████████████▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁29143.91829914.28229820.13830617.72230839.89330335.03630586.49730077.66530237.54529956.60731383.30731261.26531463.07730468.7830359.54116780.09715376.67614659.33714178.44713617.22813065.24812865.35611955.95211597.39311566.3827727.5157424.8227337.3877250.7296924.4196667.4374049.1723824.4293710.443789.5144022.9823150.043210.8713084.1663137.4022976.057NANA3021.025NA
us-gaap:Liabilities ▇▇▇████████████▄▄▄▄▄▄▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁24421.06225294.11825229.62426059.93726355.70625912.61226056.38425556.69825778.38725537.38426954.45426822.96227110.34226195.02526119.36314808.61713445.29312770.72412323.26411852.06811329.25411167.22310290.8799945.1899943.2726646.9726449.6226376.2496297.2965987.9535742.3283566.3063344.2643215.7293295.6313531.862705.372771.1722646.4842706.2682547.02NANA2590.07NA
us-gaap:LiabilitiesAndStockholdersEquity ▇██████████████▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁29143.91829914.28229820.13830617.72230839.89330335.03630586.49730077.66530237.54529956.60731383.30731261.26531463.07730468.7830359.54116780.09715376.67614659.33714178.44713617.22813065.24812865.35611955.95211597.39311566.3827727.5157424.8227337.3877250.7296924.4196667.4374049.1723824.4293710.443789.5144022.9823150.043210.8713084.1663137.4022976.057NANA3021.025NA
us-gaap:StockholdersEquity █████▇███▇▇▇▇▇▇▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁4722.8564620.1644590.5144557.7854484.1874422.4244530.1134520.9674459.1584419.2234428.8534438.3034352.7354273.7554240.1781971.481931.3831888.6131855.1831765.161735.9941698.1331665.0731652.2041623.111080.543975.2961.138953.433936.466925.109NA480.165494.711493.883491.122444.67439.699437.682431.134429.037NANA430.955NA
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities srt:ParentCompany█▆▅▄▃▂▂▂▁▁▃▅▂3018.1722922.9542864.0742825.2162757.9722704.42726.5562734.6992674.2142677.7722788.0162849.1952736.899NA2597.669NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities srt:Subsidiaries█▇▆▃▃▂▂▁▁▁▃▃▂3341.4943269.5453198.1452975.4432914.9712869.1442882.2082817.0822786.062780.9032915.4842970.6562889.174NA2770.381NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities srt:ParentCompanyNANA128.721NANANA265.145NANANA38.141NANANA88.174NANANA48.765NANANA19.529NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▃█▁▂▁▁▁▄▁▁▂▄▃▂▃487.409935.633305.002437.558324.729348.636329.151545.603343.368314.255438.11533.984445.189364.331479.906NANANA293.646NANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:PropertyPlantAndEquipmentGross NANA320.074NANANA333.798NANANA358.284NANANA410.201NANANA138.411NANANA139.317NANANA116.813112.242NANA86.1486.14NANANA85.457NANANA83.569NANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType stl:FurnitureFixturesAndEquipmentNANA116.223NANANA105.397NANANA90.397NANANA81.424NANANA63.877NANANA66.478NANANA54.60350.343NANA40.16440.164NANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:BuildingNANA79.726NANANA92.762NANANA108.416NANANA127.959NANANA29.785NANANA27.803NANANA23.11822.888NANA30.55830.558NANANA31.903NANANA31.511NANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LandAndLandImprovementsNANA91.215NANANA105.683NANANA129.767NANANA160.376NANANA11.679NANANA12.46NANANA6.0486.048NANA7.2827.282NANANA7.331NANANA7.331NANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA32.91NANANA29.956NANANA29.704NANANA40.442NANANA33.07NANANA32.576NANANA33.04432.963NANA8.1368.136NANANA7.931NANANA7.858NANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA117.519NANANA106.728NANANA94.09NANANA88.479NANANA81.093NANANA75.955NANANA70.65768.956NANA49.6249.62NANANA46.974NANANA42.683NANANANANA
us-gaap:AmortizationOfIntangibleAssets ▅▅▅▅▅▅▆▆▆▆▇▇▇██▃▃▃▄▄▄▄▅▅▃▂▃▄▄▄▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁3.7763.7764.24.24.24.24.7854.7854.7854.8265.8645.8655.8656.0526.4262.1662.1872.2292.8813.2413.2413.0533.4323.4311.781.3991.8732.5112.5112.5111.8750.3330.3370.3880.2380.3340.2830.3050.3230.3380.3050.3710.4120.4320.452
us-gaap:PropertyPlantAndEquipmentNet ▅▅▅▅▆▆▆▆▆▇▇▇▇██▁▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁204.632199.782202.555217.481226.728228.526227.07238.723250.155262.744264.194289.794290.762318.267321.72256.37857.79457.56757.31858.76160.79762.43263.36263.50863.55545.07646.15643.28648.28649.04149.92536.5237.47337.61738.08638.48338.87739.16239.8640.88642.249NANA43.598NA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:ParentCompanyNANA4881.841NANANA4643.022NANANA4513.577NANANA4373.108NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Goodwill ███████████████▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁1683.4821683.4821683.4821683.4821683.4821683.4821683.4821657.8141657.8141657.8141613.0331609.7721613.1441579.8911579.891696.6696.6696.6696.6696.6696.6696.6670.699670.699669.59400.941388.926388.926387.325387.286387.517163.117163.117163.117163.247163.247160.861160.861160.861160.861160.861NANA160.861NA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▅▅▅▅▆▆▆▆▆▇▇▇▇██▄▄▄▄▄▄▄▄▅▅▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁86.01289.78893.56497.764101.964106.164110.364115.149119.934124.719129.545135.409141.274147.139153.19159.6961.88464.09866.35369.25872.52575.7977.36780.8384.30951.75743.33245.27847.8650.44153.025.8916.2016.5386.9267.1643.7184.0014.3064.6294.967NANA3.64NA
us-gaap:FiniteLivedIntangibleAssetsNet ▁▃▅█65.51269.28873.06477.264NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▁▃▁▂▃▅▅▇█100.145101.495105.7100.635102.379107.711112.226113.985118.036122.084NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:TimeDepositMaturitiesYearOne NANA1629.168NANANA3009.102NANANA1423.423NANANA1270.605NANANA480.162NANANA494.242NANANA385.458340.813NANANA239.104NANANA344.033NANANA250.769NANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt ▁▁▂▂▃▄▄▅▆▅█▇█▇▇▅▄▄▃▃▂▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁518.021667.4991321.714993.5352014.2592598.6982885.9583174.2244133.9863633.485214.1834825.8555537.5374927.5944991.213453.7832661.8382328.5762056.6121451.5261309.9541675.5081525.344948.048914.921980.9781111.553939.0691061.777608.007669.751560.986552.805367.976345.411345.176314.154NANA375.021NANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▂▁█▁16.7116.60518.06916.576NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▁█▂14.89514.7916.60415.083NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁█▄12.18412.17614.7913.293NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive ▃▃█▁11.05411.05412.17510.67NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive ▁▁█▅39.16139.78849.46145.745NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity █████▇███▇▇▇▇▇▇▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁4722.8564620.1644590.5144557.7854484.1874422.4244530.1134520.9674459.1584419.2234428.8534438.3034352.7354273.7554240.1781971.481931.3831888.6131855.1831765.161735.9941698.1331665.0731652.2041623.111080.543975.2961.138953.433936.466925.109NA480.165494.711493.883491.122444.67439.699437.682431.134429.037NANA430.955NA
us-gaap:CommonStockValue ███████████████▅▅▅▅▄▄▄▄▄▄▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁2.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2991.4111.4111.4111.4111.3671.3671.3671.3671.3671.3670.9810.9120.9120.9120.9120.9120.5220.5220.5220.5220.5220.4590.4590.4590.4590.459NANA0.459NA
us-gaap:AdditionalPaidInCapital ███████████████▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁3753.0683745.893761.9933761.2163755.4743749.5083766.7163762.0463757.1263751.8353776.4613773.1643769.5053766.283780.9081590.7521592.2991590.2931597.2871504.7771503.0271501.4171506.6121508.6691507.837943.764858.489860.564859.826859.019856.946403.816403.424403.005402.45403.541357.62357.406357.359357.063357.232NANA356.912NA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▆▆▆▆▅▅▄▄▃▃▂▃▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁1459.0771377.3411291.6281229.7991160.8851125.7021166.7091075.503969.124888.838791.55694.861592.953496.297401.956452.65415.617382.676349.308317.385290.025261.332245.408221.335206.079220.067208.958197.46187.133178.156173.885187.889187.886184.171180.332175.971175.999172.065168.637165.199168.097NANA162.433NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▇▇███▇▆▇▆▅▃▁▂▂▄▅▄▄▄▅▅▅▅▅▅▅▅▅▅▅▄▄▄▅▅▅▅▅▅▅▅68.89957.59184.81687.86688.6167.62140.21645.13440.346-6.61-65.945-118.675-99.581-79.044-26.166-13.659-16.368-23.721-26.6357.89310.934.159-12.124-0.825-13.201-4.739-10.251-11.459-7.772-14.285-19.465-15.33-17.6570.9194.6656.8996.6835.9857.6925.136-0.774NANA5.124NA
us-gaap:TreasuryStockValue ██████▇▆▅▄▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁696.711699.415686.911660.312660.223660.069583.408501.814447.748355.357213.93551.97351.26951.10258.03959.67461.57662.04666.18866.26269.35570.14276.1978.34278.97279.5382.90886.33986.66687.33682.17688.53888.51788.51788.57390.17390.32890.32890.45290.58589.715NANA87.336NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃█▇▆▂▂▄▅▄▄▄▅▅▃▃▃▃▃▅▁▄▂▃▂▂▁▁▃▃▂▂▂▂▂▁▁▂▂▂▂▂▂▂▂39.734242.328187.26171.34230.732.50694.773130.094104.834108.368106.772112.556112.84262.60555.24261.72963.76561.869122.808-23.328102.001-2.58263.58110.4732.92-15.215-21.74151.0342.39129.9979.0388.21611.30419.414-16.31-10.19314.1476.72614.3463.4149.935-3.58416.7130.123NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▅▆▅▃▅▂▅▄█▄▅▂▄▇▁▃▃▂▃▃▃▃▄▅▄▄▄▃▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄387.164346.576558.581308.477-470.833222.186-739.46458.033-163.6661477.843-149.09247.205-937.565-223.1091014.874-1262.457-613.965-547.746-765.292-400.744-412.56-631.548-494.03-54.555123.488-211.662-114.863-156.426-301.513-237.426423.256-218.765-105.373-19.226-59.734-104.70738.44-34.118-191.08881.214-76.4254.5143.321-3.488NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▅▃▄▆▄▆▄▅▁▅▄▇▅▃█▆▆▆▆▅▇▆▅▅▆▅▅▆▅▄▅▅▅▄▆▅▅▅▅▅▅▅▅-875.12241.727-878.397-366.99416.196-205.207428.235-385.89287.945-1710.066-53.556-270.966905.58144.929-997.4131325.764578.664445.934555.672546.20482.155891.347341.823-4.20323.318292.05880.50566.506310.986219.412-392.722214.473129.839-87.033-201.697441.482-30.20672.724-61.083151.35439.345-13.104-76.06251.577NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁█▃▅▄▄▃▅▄▃▃▄▄▃-448.224630.631-132.556112.829-23.90719.485-216.452202.23529.113-123.855-95.87488.79580.858-115.575NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:DepreciationDepletionAndAmortization ▇▇▇█████▇██████▄▃▃▃▃▃▃▃▃▂▂▂▂▂▃▂▁▁▂▁▂▁▂▂▃▁▂▂▂4.4494.5764.6924.8574.9075.0345.1195.0844.7334.995.1355.0155.1175.0825.0312.392.2352.0142.0932.0942.0862.1022.1442.111.5891.6331.4561.5471.5411.8021.6171.0430.8581.1841.1581.2580.9831.251.2552.2061.1111.4471.4131.478NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃█▇▆▂▂▄▅▄▄▄▅▅▃▃▃▃▃▅▁▄▂▃▂▂▁▁▃▃▂▂▂▂▂▁▁▂▂▂▂▂▂▂▂39.734242.328187.26171.34230.732.50694.773130.094104.834108.368106.772112.556112.84262.60555.24261.72963.76561.869122.808-23.328102.001-2.58263.58110.4732.92-15.215-21.74151.0342.39129.9979.0388.21611.30419.414-16.31-10.19314.1476.72614.3463.4149.935-3.58416.7130.123NA
us-gaap:NetIncomeLoss ▇▇▆▆▅▃▇█▇▇███▇▁▅▄▄▄▄▄▄▄▄▂▃▃▃▃▃▂▃▃▃▃▃▃▃▃▂▃▃▃▃▃98.33999.1576.42384.40750.79214.147106.698122.44796.46101.437114.491119.65114.24198.872-33.27944.85242.439.06740.99637.42237.7723.76632.79124.193-7.64616.77817.00416.33715.01110.332-14.0025.3296.3766.5297.022.2616.2095.7015.717-0.4931.9393.5736.725.4034.756
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▅▅▆▅▃▅▂▅▄█▄▅▂▄▇▁▃▃▂▃▃▃▃▄▅▄▄▄▃▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄387.164346.576558.581308.477-470.833222.186-739.46458.033-163.6661477.843-149.09247.205-937.565-223.1091014.874-1262.457-613.965-547.746-765.292-400.744-412.56-631.548-494.03-54.555123.488-211.662-114.863-156.426-301.513-237.426423.256-218.765-105.373-19.226-59.734-104.70738.44-34.118-191.08881.214-76.4254.5143.321-3.488NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment █▅▅▃▃▇▅▇▇▄▇▆▇▂▃▂▃▃▂▁▁▂▂▃▃▁▄▁▁▂▇▁▁▁▁▁▁▁▁▂▁▁▂▂9.2995.5885.6162.9333.1358.3744.8877.8267.4523.547.6467.2497.4931.6272.560.9742.4622.2631.9260.7820.4510.9961.9982.4913.2240.3344.3260.150.7860.9188.5720.170.7140.7150.7560.3790.6930.5520.2290.8430.530.7821.312.093NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▅▃▄▆▄▆▄▅▁▅▄▇▅▃█▆▆▆▆▅▇▆▅▅▆▅▅▆▅▄▅▅▅▄▆▅▅▅▅▅▅▅▅-875.12241.727-878.397-366.99416.196-205.207428.235-385.89287.945-1710.066-53.556-270.966905.58144.929-997.4131325.764578.664445.934555.672546.20482.155891.347341.823-4.20323.318292.05880.50566.506310.986219.412-392.722214.473129.839-87.033-201.697441.482-30.20672.724-61.083151.35439.345-13.104-76.06251.577NA
us-gaap:PaymentsOfDividendsCommonStock ▁▁▂▂▂▃▄▅▆█13.39813.4913.53413.54513.64813.76814.11514.30514.61115.079NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsForRepurchaseOfCommonStock ▁▂▂▁▁▅▅▃▅██▁▁▁0.027.32530.5650.00.081.03281.94153.73992.914154.289159.9030.00.00.0NANANANANANANANANANANANANANANANA0.0NANANA0.0210.0NANA0.01.244NANANA3.279NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value2299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.01411000.01411000.01411000.01411000.01367000.01367000.01367000.01367000.01367000.01367000.0981000.0912000.0912000.0912000.0912000.0912000.0522000.0522000.0522000.0522000.0522000.0459000.0459000.0459000.0459000.0459000.0459000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-06-302011-03-312010-12-312010-06-30
Value1921921931931962032072132252252251351351351301301301299188848383837043434337373737373738
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-06-302011-03-312010-12-312010-06-30
Value1911911931931962032062132252252241351351351301301291299187838383837043434337373737373738
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-06-30
Value0359300.0305010.023590.0000000000000149.0117540.0112890.082625.0530550.0562810.0653150.02025500.01254100.01332600.01358800.01764200.01710900.01935800.01862300.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.50.510.390.430.250.060.520.590.460.470.510.520.50.43-0.160.330.310.290.310.290.290.180.250.19-0.080.190.20.20.180.12-0.20.120.150.150.160.060.170.150.15-0.010.050.10.180.150.12
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.50.50.380.430.250.060.520.590.460.470.510.520.50.43-0.160.330.310.290.310.290.290.180.250.19-0.080.190.20.190.180.12-0.20.120.150.150.160.060.170.150.15-0.010.050.10.180.150.12
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

srt:ParentCompany


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value13.0212.5311.9611.750.11570.11470.11650.12350.12150.12630.12950.13640.12980.1307
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value14.4414.0413.3812.390.12240.12190.12320.12730.12670.13130.13550.14230.13710.1395
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets110.9112.1111.9105.4105.8106.3105.8103.1104.3104.0104.6104.3105.6106.7

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:CapitalToRiskWeightedAssets

srt:ParentCompany


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value15.9215.8215.214.170.1420.13730.13890.13490.1330.13780.14060.14740.14060.1418
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value15.2215.4214.7313.860.13850.1380.13520.13990.13940.14410.1480.1550.14940.1521
Percentage of CapitalToRiskWeightedAssets95.697.596.997.897.5100.597.3103.7104.8104.6105.3105.2106.3107.3

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.7816.6175.2225.8685.9136.0065.184.5654.6055.1233.683.1153.3362.8542.5081.9691.8971.7361.5571.6741.7471.541.041.0641.1271.1091.1440.8240.780.9270.9910.5130.5470.6790.50.3020.3260.2840.2750.3030.2840.2960.2790.3380.172
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.92.82.22.42.32.21.81.51.51.71.21.01.11.00.91.41.41.41.31.41.51.51.01.01.61.71.71.21.21.51.91.51.72.11.51.01.21.01.01.11.01.11.01.20.6

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

stl:NonvestedStockAwardsandPerformanceUnits


Allocated
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6.7816.6175.9136.0065.184.5654.6055.1233.6793.1133.3342.8522.5051.9211.8491.6861.4981.5791.6221.4140.8710.8630.8690.8280.8280.5730.5780.5580.62
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.099.999.999.999.997.697.597.196.294.392.891.883.881.177.174.772.469.574.160.262.6
Percentage of InterestAndDividendIncomeOperating2.92.82.32.21.81.51.51.71.21.01.11.00.91.31.41.31.21.31.41.30.80.81.21.21.20.90.90.91.2
Percentage of InterestAndDividendIncomeOperating stl:NonvestedStockAwardsandPerformanceUnits0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value10971738371411011271431601671009351-45.7954749416.4863444402136-16.1082218122115-18.1377.656-12.22.7834.7862.4776.9073.9948.2735.417113.807-8.7266.92610
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating47.630.830.234.228.315.234.443.147.452.053.432.530.718.2-16.632.637.133.35.329.139.037.820.235.4-22.433.426.718.832.725.4-34.422.6-37.48.614.48.224.414.129.419.540.313.7-30.023.636.1

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-302013-12-312013-09-30
Value-1243000.0-6241000.0-9723000.0-744000.000046000.0172000.000000000-1013000.00-8716000.0000000
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0100.0100.00.00.00.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.00.00.00.00.00.00.0
Percentage of InterestAndDividendIncomeOperating-0.5-2.6-3.8-0.30.00.00.00.00.10.00.00.00.00.00.00.00.0-0.90.0-8.20.00.00.00.00.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:LongtermDebtType

us-gaap:FederalHomeLoanBankAdvances


Gains
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-2749000.0-6237000.0-9723000.0-753000.000
Percentage of GainsLossesOnExtinguishmentOfDebt0.099.9100.0101.20.00.0
Percentage of InterestAndDividendIncomeOperating-1.1-2.5-3.8-0.30.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:FederalHomeLoanBankAdvances0.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1221229496576.105134154120129144146146128-4.96666256605456364835-11.3282425222114-20.958.6419.2098.732101.9818.5877.7367.743-1.3191.7524.4159.6987.4185.988
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating53.352.239.139.522.92.245.652.539.842.046.347.547.945.6-1.845.646.745.149.346.049.134.045.734.7-15.737.337.334.032.024.3-39.725.528.326.930.46.630.327.227.5-4.76.315.933.425.319.7

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value242218127.11-8.042273223283027312928212017191618121511-3.6828.0788.3766.4526.0574.588-6.9483.3122.8332.2033.066-0.282.3782.0352.026-0.826-0.1870.8422.9782.0151.232
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating10.69.87.65.02.8-2.99.411.07.99.29.78.810.510.510.214.815.114.116.014.416.111.514.911.3-5.112.112.39.69.27.5-13.29.88.76.89.3-0.98.47.27.2-3.0-0.73.010.26.94.1

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9.135.3160.9642.3788.3395.6781728160.0148.926.8236.9759.6472.0544202.785397.7710.93178.3250.01317123.7630.044.0194.651-0.2250.0974.4860.1170.2290.0691.5390.0362.0362.2244.7740.0363.111
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating4.02.30.41.03.32.15.99.85.30.02.82.22.33.40.730.715.02.231.76.60.816.27.80.018.326.718.35.60.16.68.8-0.70.313.80.40.80.25.40.17.38.017.20.110.6

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value11152026396167717073706558464225211715151312109.9448.3737.8057.857.4767.317.2976.8355.7954.2764.6015.2224.8744.2634.5064.935.0265.135.2925.8766.0056.21
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating5.16.88.511.015.822.622.724.423.323.922.521.119.216.715.417.615.613.712.912.712.211.810.29.611.611.711.511.111.111.913.017.113.114.215.816.215.015.917.518.118.419.020.220.520.4

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value218217222217213211228223231235242243246234234120113108107103100939593635860595854452828272725242323222222232324
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating94.993.291.589.084.277.477.375.676.776.177.578.980.883.384.682.484.486.387.187.387.888.289.890.488.488.388.588.988.988.187.082.986.985.884.283.885.084.182.581.981.681.079.879.579.6

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value209.5952523515872677469716558415722
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating8.94.110.59.620.121.524.622.924.622.622.821.119.114.920.615.5

Marketing And Advertising Expense

us-gaap:MarketingAndAdvertisingExpense

us-gaap:MarketingAndAdvertisingExpense


Marketing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1960000.01708000.02676000.01291000.01140000.01983000.03569000.02514000.01384000.0991000.01968000.01147000.01272000.01543000.01648000.0649000.0834000.0551000.0675000.0737000.0985000.0551000.0751000.0699000.0596000.0782000.0664000.0963000.0422000.0309000.0416000.0307000.0535000.0244000.0369000.0440000.0427000.0613000.0677000.0855000.0843000.0953000.0675000.01041000.0
Percentage of MarketingAndAdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.90.71.10.50.50.71.20.90.50.30.60.40.40.50.60.40.60.40.50.60.90.50.70.70.81.11.01.50.70.61.20.91.70.71.21.61.52.22.43.13.03.32.33.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9899768450141061229610111411911498-33.279444239403737233224-7.6461617161510-14.0025.3296.3766.5297.022.2616.2095.7015.717-0.4931.9393.5736.725.4034.756
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating42.742.431.534.520.15.236.141.531.932.836.638.737.535.1-12.030.831.631.033.331.733.022.430.923.4-10.625.225.024.322.816.8-26.615.719.620.121.27.521.920.120.3-1.86.912.923.118.415.6

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value98998450141229610111911498-33.288444239413737233224-7.6481617161510-14.0025.3296.3766.5297.022.2616.2095.7015.717-0.493
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating42.742.434.520.15.241.531.932.838.737.535.1-12.030.831.631.033.331.733.022.430.923.4-10.625.225.024.322.816.8-26.615.719.620.121.27.521.920.120.3-1.8
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-09-302014-06-30
Value969774824812104120949911211711296-35.281444239403737233324-7.6081614
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating41.841.630.733.719.34.435.440.831.232.135.938.136.834.4-12.830.831.631.033.331.733.022.431.123.3-10.624.222.7

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-3.05-0.7442027-4.9184.788465952-19.094-20.537-47.749-12.5072.7097.3532.914-34.528-3.0376.77116-11.29912-8.4625.5121.208-3.6876.5135.241-4.1352.327-18.576-3.746-2.2340.2160.698-1.7072.5565.919.314
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-1.3-0.38.310.0-1.71.615.519.216.8-6.2-6.7-17.0-4.51.95.52.3-28.1-2.65.915.4-10.612.0-11.88.31.8-5.59.98.5-7.86.9-57.0-11.6-6.70.72.5-6.09.121.233.3

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-3.145-1.4032067-5.2541646-19.57740-19.557
Percentage of OtherComprehensiveIncomeLossNetOfTax103.1188.699.5245.4106.8335.699.7-33.076.5102.4
Percentage of InterestAndDividendIncomeOperating-1.3-0.68.224.6-1.85.415.5-6.312.9-6.3
Percentage of InterestAndDividendIncomeOperating us-gaap:AvailableforsaleSecurities us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.0

us-gaap:HeldtomaturitySecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0780.0950.043-0.4680.0850.0860.088-0.7970.1610.163
Percentage of OtherComprehensiveIncomeLossNetOfTax-2.6-12.80.2-1.7-1.71.80.2-1.30.3-0.9
Percentage of InterestAndDividendIncomeOperating0.00.00.0-0.20.00.00.0-0.30.10.1
Percentage of InterestAndDividendIncomeOperating us-gaap:HeldtomaturitySecurities us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.0170.5640.0550.840.251-11.3650.04813120.30.042-0.901-0.4750.0260.2140.0175.380.0970.117-2.937-0.47-0.015-0.7481.4473.3911.53
Percentage of OtherComprehensiveIncomeLossNetOfTax-0.6-75.80.33.1-5.1-237.40.123.223.2-1.6-0.21.93.80.41.3-0.243.5-1.12.1-243.112.7-0.2-14.3-35.0145.7-8.2
Percentage of InterestAndDividendIncomeOperating0.00.20.00.30.1-3.80.04.43.90.10.0-0.3-0.20.00.20.05.20.10.2-4.3-0.7-0.0-1.22.710.04.7
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-0.74420274.7884659-19.094-20.537-47.749-12.5072.7097.3532.914-34.528-3.0376.77116-11.29912-8.4625.5121.208-3.6876.5135.18-4.1352.327-18.576-3.746-2.2340.216
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.8100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-0.38.310.01.615.519.2-6.2-6.7-17.0-4.51.95.52.3-28.1-2.65.915.4-10.612.0-11.88.31.8-5.59.98.4-7.86.9-57.0-11.6-6.70.7
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value7.0966.5635.9755.965.3456.6226.5076.5827.0986.2126.5116.3336.9857.0037.2353.309
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating3.12.82.52.42.12.42.22.22.32.02.12.02.32.52.62.3

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value2914329914298203061730839303353058630077302372995631383312613146330468303591678015376146591417813617130651286511955115971156677277424733772506924666740493824371037894022315032103084313729763021
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets dei:LegalEntity, us-gaap:StatementScenario, us-gaap:SubsequentEventType

stl:WebsterAfterMerger, srt:ProForma, us-gaap:SubsequentEvent


Assetsdei:
Period End2021-04-19
Value63000
Percentage of Assets0.0
Percentage of Assets0.0
Percentage of Assets stl:WebsterAfterMerger srt:ProForma us-gaap:SubsequentEvent100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value5090498146154526
Percentage of Assets17.116.314.714.9
Percentage of Assets17.116.314.714.9
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value24421252942522926059263552591226056255562577825537269542682227110261952611914808134451277012323118521132911167102909945994366466449637662975987574235663344321532953531270527712646270625472590
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets83.884.684.685.185.585.485.285.085.385.285.985.886.286.086.088.387.487.186.987.086.786.886.185.886.086.086.986.986.986.586.188.187.486.787.087.885.986.385.886.385.685.7

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-31
Value500450186286
Percentage of Liabilities2.01.70.71.1
Percentage of Assets1.71.50.60.9
Percentage of Assets srt:ParentCompany9.89.14.06.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value2914329914298203061730839303353058630077302372995631383312613146330468303591678015376146591417813617130651286511955115971156677277424733772506924666740493824371037894022315032103084313729763021
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value5090498146154526
Percentage of LiabilitiesAndStockholdersEquity17.116.314.714.9
Percentage of Assets17.116.314.714.9
Percentage of Assets srt:ParentCompany100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value47224620459045574484442245304520445944194428443843524273424019711931188818551765173516981665165216231080975961953936925482480494493491444439437431429430427399
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.215.415.414.914.514.614.815.014.714.814.114.213.814.014.011.712.612.913.113.013.313.213.914.214.014.013.113.113.113.513.90.012.613.313.012.214.113.714.213.714.414.30.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value4590453044284240
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets15.414.814.114.0
Percentage of Assets srt:ParentCompany90.290.996.093.7

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

stl:AOCIAccumulatedGainLossDebtSecuritiesTransferredToHeldToMaturityParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value-0.19-0.219-0.252-0.425-0.468-0.538
Percentage of StockholdersEquity-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets stl:AOCIAccumulatedGainLossDebtSecuritiesTransferredToHeldToMaturityParent0.00.00.00.00.00.0

stl:NetUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldtomaturity


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value-0.252-0.33-0.425-0.468-0.538-0.623-0.709-0.797-2.546-2.707-2.87-3.034-2.678-2.825-2.969-3.117-3.264-3.403-3.731-4.2-4.155-4.323-4.493-4.967-5.1440.0
Percentage of StockholdersEquity-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.5-0.50.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.10.0
Percentage of Assets stl:NetUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldtomaturity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value-0.348-0.7131.4761.4590.8950.842.6982.447131311-0.559-0.859-0.901-1.164-0.689-0.695-0.7-0.734-0.741-0.73-0.756-0.97-0.987-6.367-6.581-3.644-3.858
Percentage of StockholdersEquity-0.0-0.00.00.00.00.00.10.10.30.30.3-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.4-0.7-0.40.0
Percentage of Assets-0.0-0.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.0-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value695883868867384327-19.577-75.077-115.409-95.852-75.109-22.324-10.145-12.704-19.904-22.63712159.115-6.9994.485-2.3421.297-2.671-11.472
Percentage of StockholdersEquity1.51.31.81.92.01.50.81.00.6-0.4-1.7-2.6-2.2-1.8-0.5-0.5-0.7-1.1-1.20.70.90.5-0.40.3-0.10.1-0.30.0
Percentage of Assets0.20.20.30.30.30.20.10.10.1-0.1-0.2-0.4-0.3-0.2-0.1-0.1-0.1-0.1-0.20.10.10.1-0.10.0-0.00.0-0.0-0.3
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value685784878867404540-6.61-65.945-118.675-99.581-79.044-26.166-13.659-16.368-23.721-26.6357.893104.159-12.124-0.825-13.201-4.739-10.251-11.459-7.772-14.285-19.465-15.33-17.6570.9194.6656.8996.6835.9857.6925.136-0.7745.1242.477-9.581
Percentage of StockholdersEquity1.51.21.81.92.01.50.91.00.9-0.1-1.5-2.7-2.3-1.8-0.6-0.7-0.8-1.3-1.40.40.60.2-0.7-0.0-0.8-0.4-1.1-1.2-0.8-1.5-2.1-3.2-3.70.20.91.41.51.41.81.2-0.21.20.6-2.4
Percentage of Assets0.20.20.30.30.30.20.10.20.1-0.0-0.2-0.4-0.3-0.3-0.1-0.1-0.1-0.2-0.20.10.10.0-0.1-0.0-0.1-0.1-0.1-0.2-0.1-0.2-0.30.0-0.50.00.10.20.20.20.20.2-0.00.20.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value3753374537613761375537493766376237573751377637733769376637801590159215901597150415031501150615081507943858860859859856403403403402403357357357357357356355352
Percentage of StockholdersEquity79.581.182.082.583.784.883.183.284.384.985.385.086.688.189.280.782.484.286.185.286.688.490.591.392.987.388.089.590.291.792.683.684.081.581.582.280.481.381.682.883.382.883.288.4
Percentage of Assets12.912.512.612.312.212.412.312.512.412.512.012.112.012.412.59.510.410.811.311.111.511.712.613.013.012.211.611.711.912.412.90.010.510.910.610.011.411.111.611.412.011.80.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value2.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2991.4111.4111.4111.4111.3671.3671.3671.3671.3671.3670.9810.9120.9120.9120.9120.9120.5220.5220.5220.5220.5220.4590.4590.4590.4590.4590.4590.4590.459
Percentage of StockholdersEquity0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1361361361361371371371371381381381381381391390.00.0
Percentage of StockholdersEquity2.93.03.03.03.13.13.03.03.13.13.13.13.23.33.30.00.0
Percentage of Assets0.50.50.50.40.40.50.40.50.50.50.40.40.40.50.50.00.0
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value14591377129112291160112511661075969888791694592496401452415382349317290261245221206220208197187178173187187184180175175172168165168162153138
Percentage of StockholdersEquity30.929.828.127.025.925.525.823.821.720.117.915.713.611.69.523.021.520.318.818.016.715.414.713.412.720.421.420.519.619.018.838.939.137.236.535.839.639.138.538.339.237.735.834.8
Percentage of Assets5.04.64.34.03.83.73.83.63.23.02.52.21.91.61.32.72.72.62.52.32.22.02.11.91.82.82.82.72.62.62.60.04.95.04.84.45.65.45.55.35.65.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value-696.711-699.415-686.911-660.312-660.223-660.069-583.408-501.814-447.748-355.357-213.935-51.973-51.269-51.102-58.039-59.674-61.576-62.046-66.188-66.262-69.355-70.142-76.19-78.342-78.972-79.53-82.908-86.339-86.666-87.336-82.176-88.538-88.517-88.517-88.573-90.173-90.328-90.328-90.452-90.585-89.715-87.336-77.29-75.687
Percentage of StockholdersEquity-14.8-15.1-15.0-14.5-14.7-14.9-12.9-11.1-10.0-8.0-4.8-1.2-1.2-1.2-1.4-3.0-3.2-3.3-3.6-3.8-4.0-4.1-4.6-4.7-4.9-7.4-8.5-9.0-9.1-9.3-8.9-18.3-18.4-17.9-17.9-18.4-20.3-20.5-20.7-21.0-20.9-20.3-18.1-19.0
Percentage of Assets-2.4-2.3-2.3-2.2-2.1-2.2-1.9-1.7-1.5-1.2-0.7-0.2-0.2-0.2-0.2-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.6-0.7-0.7-1.0-1.1-1.2-1.2-1.3-1.20.0-2.3-2.4-2.3-2.2-2.9-2.8-2.9-2.9-3.0-2.90.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapital

srt:ParentCompany


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value30182922286428252757270427262734267426772788284927362597
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.49.89.69.28.98.98.99.18.88.98.99.18.78.6
Percentage of Assets srt:ParentCompany0.00.056.30.00.00.054.70.00.00.060.40.00.057.4

srt:Subsidiaries


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value33413269319829752914286928822817278627802915297028892770
Percentage of TierOneRiskBasedCapital110.7111.9111.7105.3105.7106.1105.7103.0104.2103.9104.6104.3105.6106.6
Percentage of Assets11.510.910.79.79.59.59.49.49.29.39.39.59.29.1
Percentage of Assets srt:Subsidiaries0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:ConsolidatedEntities

us-gaap:CashAndCashEquivalentsAtCarryingValue

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value12826538884819
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.90.10.30.30.2
Percentage of Assets srt:ParentCompany2.55.30.81.90.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value487935305437324348329545343314438533445364479293
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.73.11.01.41.11.11.11.81.11.01.41.71.41.21.62.1

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value128265388848
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents42.280.68.718.416.6
Percentage of Assets0.40.90.10.30.3
Percentage of Assets srt:ParentCompany2.55.30.81.90.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-302012-09-302011-09-30
Value32033335841013813911611286868583
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.11.41.01.21.61.51.32.12.12.7

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

stl:FurnitureFixturesAndEquipment


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-30
Value1161059081636654504040
Percentage of PropertyPlantAndEquipmentGross36.331.625.219.846.247.746.744.946.646.6
Percentage of Assets0.40.30.30.30.50.60.70.70.61.0
Percentage of Assets stl:FurnitureFixturesAndEquipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:Building


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-302012-09-302011-09-30
Value79921081272927232230303131
Percentage of PropertyPlantAndEquipmentGross24.927.830.331.221.520.019.820.435.535.537.337.7
Percentage of Assets0.30.30.30.40.20.20.30.30.50.80.81.0
Percentage of Assets us-gaap:Building0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LandAndLandImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-302012-09-302011-09-30
Value9110512916011126.0486.0487.2827.2827.3317.331
Percentage of PropertyPlantAndEquipmentGross28.531.736.239.18.48.95.25.48.58.58.68.8
Percentage of Assets0.30.30.40.50.10.10.10.10.10.20.20.2
Percentage of Assets us-gaap:LandAndLandImprovements0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-302012-09-302011-09-30
Value32292940333233328.1368.1367.9317.858
Percentage of PropertyPlantAndEquipmentGross10.39.08.39.923.923.428.329.49.49.49.39.4
Percentage of Assets0.10.10.10.10.20.30.40.40.10.20.20.3
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-12-312013-09-302012-09-302011-09-30
Value11710694888175706849494642
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.30.30.30.60.61.00.90.71.21.21.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.7763.7764.24.24.24.24.7854.7854.7854.8265.8645.8655.8656.0526.4262.1662.1872.2292.8813.2413.2413.0533.4323.4311.781.3991.8732.5112.5112.5111.8750.3330.3370.3880.2380.3340.2830.3050.3230.3380.3050.3710.4120.4320.452
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value204199202217226228227238250262264289290318321565757575860626363634546434849493637373838383939404243
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.70.70.70.70.80.70.80.80.90.80.90.91.01.10.30.40.40.40.40.50.50.50.50.50.60.60.60.70.70.70.91.01.01.01.01.21.21.31.31.41.4

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany


Investments
Period End2020-12-312019-12-312018-12-312017-12-31
Value4881464345134373
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0
Percentage of Assets16.415.214.414.4
Percentage of Assets srt:ParentCompany95.993.297.896.6

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-08-102012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-30
Value168316831683168316831683168316571657165716131609161315791579696696696696696696696670670669400388388387387387163163163163163164160160160160160160160
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.85.65.65.55.55.55.55.55.55.55.15.15.15.25.24.24.54.84.95.15.35.45.65.85.85.25.25.35.35.65.84.04.34.44.34.10.05.15.05.25.15.45.30.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value86899397101106110115119124129135141147153596164666972757780845143454750535.8916.2016.5386.9267.1643.7184.0014.3064.6294.9673.64
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.40.40.40.40.40.40.40.50.50.40.40.40.50.50.60.60.60.70.70.70.60.60.70.70.80.10.20.20.20.20.10.10.10.10.20.1

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CoreDeposits


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-09-30
Value62666973778185909599104109115120126323435373941434548501718194.02
Percentage of IntangibleAssetsNetExcludingGoodwill72.773.774.675.576.477.177.978.679.379.980.581.181.782.282.654.555.255.956.457.157.457.759.259.760.234.242.643.068.2
Percentage of Assets0.20.20.20.20.30.30.30.30.30.30.30.40.40.40.40.20.20.20.30.30.30.30.40.40.40.20.20.30.1
Percentage of Assets us-gaap:CoreDeposits0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerLists


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2.963.1083.2563.4273.5993.773.9424.1424.3414.5414.744.9725.2035.4355.8546.3126.7697.2267.6838.1748.6659.1567.9598.2569.0138.8510.0
Percentage of IntangibleAssetsNetExcludingGoodwill3.43.53.53.53.53.63.63.63.63.63.73.73.73.73.810.610.911.311.611.811.912.110.310.210.717.10.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.0
Percentage of Assets us-gaap:CustomerLists0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value65697377
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0
Percentage of Assets0.20.20.20.3

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value100101105100102107112113118122125
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.40.30.30.40.40.40.40.40.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value10031006106310851058990840738675535432389402385357158142634858507168631414340416280744528252324272623293529
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.43.63.53.43.32.72.52.21.81.41.21.31.31.20.90.90.40.30.40.40.60.60.51.20.60.50.60.91.21.11.10.70.70.60.60.90.80.80.91.21.0

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-312017-12-31
Value31241516
Percentage of OtherAssets3.02.93.54.7
Percentage of Assets0.10.10.00.1
Percentage of Assets srt:ParentCompany0.60.50.30.4

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-09-302012-09-302011-09-30
Value1629300914231270480494385340239344250
Percentage of TimeDepositMaturitiesYearOne100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.59.84.54.23.44.15.24.65.98.68.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-09-30
Value5186671321993201425982885317441333633521448255537492749913453266123282056145113091675152594891498011119391061608669560552367345345314375
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.82.24.43.26.58.69.410.613.712.116.615.417.616.216.420.617.315.914.510.710.013.012.88.27.912.715.012.814.68.810.013.914.59.99.18.610.012.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

srt:ParentCompany, stl:SubordinatedNotesDueTwoThousandThirty, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-31
Value221221221
Percentage of LongTermDebt42.833.216.8
Percentage of Assets0.80.70.7
Percentage of Assets srt:ParentCompany stl:SubordinatedNotesDueTwoThousandThirty us-gaap:SubordinatedDebt0.00.00.0

srt:ParentCompany, stl:SubordinatedNotesDueTwoThousandTwentyNine, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312019-12-31
Value270270270270
Percentage of LongTermDebt52.240.520.49.4
Percentage of Assets0.90.90.90.9
Percentage of Assets srt:ParentCompany stl:SubordinatedNotesDueTwoThousandTwentyNine us-gaap:SubordinatedDebt0.00.00.00.0

us-gaap:LongTermDebt us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

srt:ParentCompany, us-gaap:SubordinatedDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value492492491270271271270
Percentage of LongTermDebt95.073.737.227.213.510.49.4
Percentage of Assets1.71.61.60.90.90.90.9
Percentage of Assets srt:ParentCompany us-gaap:SubordinatedDebt0.00.00.00.00.00.00.0

srt:Subsidiaries, us-gaap:SubordinatedDebt


Long
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value143143173173173173172
Percentage of LongTermDebt21.510.917.48.66.76.03.3
Percentage of Assets0.50.50.60.60.60.60.6
Percentage of Assets srt:Subsidiaries us-gaap:SubordinatedDebt0.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

stl:PaycheckProtectionProgramLiquidityFacility, us-gaap:LineOfCredit


Long
Period End2020-09-302020-06-30
Value117568
Percentage of LongTermDebt11.828.2
Percentage of Assets0.41.8
Percentage of Assets stl:PaycheckProtectionProgramLiquidityFacility us-gaap:LineOfCredit0.00.0

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:FederalFundsPurchased


Long
Period End2020-12-312017-09-302017-06-302017-03-312016-12-312014-12-312014-09-302013-09-30
Value277160100200.00.0200.0
Percentage of LongTermDebt21.04.63.80.90.00.02.10.0
Percentage of Assets0.91.00.70.10.00.00.30.0
Percentage of Assets us-gaap:FederalFundsPurchased0.00.00.00.00.00.00.00.0

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase


Long
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-09-30
Value2531272722262027212219263028222416212823164239259.8462523196120228228238238207211
Percentage of LongTermDebt5.04.72.11.10.80.80.50.70.40.50.30.50.60.80.81.10.81.52.21.41.14.54.32.60.92.72.23.39.13.641.462.169.069.066.056.4
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.20.10.20.10.20.20.20.10.40.30.30.10.30.30.30.90.56.06.26.35.96.66.7
Percentage of Assets us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FederalHomeLoanBankAdvances


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-09-30
Value3823979751955224528003766325948384429506744494510301622902035179111811074144414098067778571003795939489489442323139106106106111
Percentage of LongTermDebt28.940.048.475.277.888.291.189.792.891.891.590.390.487.386.087.487.181.482.086.292.485.184.987.490.384.788.580.673.178.958.637.931.031.034.029.8
Percentage of Assets1.31.33.26.47.39.312.510.915.414.216.114.614.918.014.913.912.68.78.211.211.87.06.711.113.510.813.07.17.310.98.53.82.82.73.43.6
Percentage of Assets us-gaap:FederalHomeLoanBankAdvances0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SecuritiesSoldUnderAgreementsToRepurchase


Long
Period End2020-09-302020-06-302019-12-31
Value352622
Percentage of LongTermDebt3.51.30.8
Percentage of Assets0.10.10.1
Percentage of Assets us-gaap:SecuritiesSoldUnderAgreementsToRepurchase0.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value16161816
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value14141615
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.10.00.10.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value12121413
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value11111210
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value39394945
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0
Percentage of Assets0.10.10.20.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-01
Value106109113108109114118120124128130
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.40.40.40.40.40.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value121126129124
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.40.40.40.4

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value15161616
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value47224620459045574484442245304520445944194428443843524273424019711931188818551765173516981665165216231080975961953936925482480494493491444439437431429430427399
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.215.415.414.914.514.614.815.014.714.814.114.213.814.014.011.712.612.913.113.013.313.213.914.214.014.013.113.113.113.513.90.012.613.313.012.214.113.714.213.714.414.30.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value4590453044284240
Percentage of StockholdersEquity100.0100.0100.0100.0
Percentage of Assets15.414.814.114.0
Percentage of Assets srt:ParentCompany90.290.996.093.7

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

stl:AOCIAccumulatedGainLossDebtSecuritiesTransferredToHeldToMaturityParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value-0.19-0.219-0.252-0.425-0.468-0.538
Percentage of StockholdersEquity-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets stl:AOCIAccumulatedGainLossDebtSecuritiesTransferredToHeldToMaturityParent0.00.00.00.00.00.0

stl:NetUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldtomaturity


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value-0.252-0.33-0.425-0.468-0.538-0.623-0.709-0.797-2.546-2.707-2.87-3.034-2.678-2.825-2.969-3.117-3.264-3.403-3.731-4.2-4.155-4.323-4.493-4.967-5.1440.0
Percentage of StockholdersEquity-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.5-0.50.0
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.10.0
Percentage of Assets stl:NetUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldtomaturity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value-0.348-0.7131.4761.4590.8950.842.6982.447131311-0.559-0.859-0.901-1.164-0.689-0.695-0.7-0.734-0.741-0.73-0.756-0.97-0.987-6.367-6.581-3.644-3.858
Percentage of StockholdersEquity-0.0-0.00.00.00.00.00.10.10.30.30.3-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.4-0.7-0.40.0
Percentage of Assets-0.0-0.00.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.0-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312014-09-302013-09-30
Value695883868867384327-19.577-75.077-115.409-95.852-75.109-22.324-10.145-12.704-19.904-22.63712159.115-6.9994.485-2.3421.297-2.671-11.472
Percentage of StockholdersEquity1.51.31.81.92.01.50.81.00.6-0.4-1.7-2.6-2.2-1.8-0.5-0.5-0.7-1.1-1.20.70.90.5-0.40.3-0.10.1-0.30.0
Percentage of Assets0.20.20.30.30.30.20.10.10.1-0.1-0.2-0.4-0.3-0.2-0.1-0.1-0.1-0.1-0.20.10.10.1-0.10.0-0.00.0-0.0-0.3
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value685784878867404540-6.61-65.945-118.675-99.581-79.044-26.166-13.659-16.368-23.721-26.6357.893104.159-12.124-0.825-13.201-4.739-10.251-11.459-7.772-14.285-19.465-15.33-17.6570.9194.6656.8996.6835.9857.6925.136-0.7745.1242.477-9.581
Percentage of StockholdersEquity1.51.21.81.92.01.50.91.00.9-0.1-1.5-2.7-2.3-1.8-0.6-0.7-0.8-1.3-1.40.40.60.2-0.7-0.0-0.8-0.4-1.1-1.2-0.8-1.5-2.1-3.2-3.70.20.91.41.51.41.81.2-0.21.20.6-2.4
Percentage of Assets0.20.20.30.30.30.20.10.20.1-0.0-0.2-0.4-0.3-0.3-0.1-0.1-0.1-0.2-0.20.10.10.0-0.1-0.0-0.1-0.1-0.1-0.2-0.1-0.2-0.30.0-0.50.00.10.20.20.20.20.2-0.00.20.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value3753374537613761375537493766376237573751377637733769376637801590159215901597150415031501150615081507943858860859859856403403403402403357357357357357356355352
Percentage of StockholdersEquity79.581.182.082.583.784.883.183.284.384.985.385.086.688.189.280.782.484.286.185.286.688.490.591.392.987.388.089.590.291.792.683.684.081.581.582.280.481.381.682.883.382.883.288.4
Percentage of Assets12.912.512.612.312.212.412.312.512.412.512.012.112.012.412.59.510.410.811.311.111.511.712.613.013.012.211.611.711.912.412.90.010.510.910.610.011.411.111.611.412.011.80.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value2.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2992.2991.4111.4111.4111.4111.3671.3671.3671.3671.3671.3670.9810.9120.9120.9120.9120.9120.5220.5220.5220.5220.5220.4590.4590.4590.4590.4590.4590.4590.459
Percentage of StockholdersEquity0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1361361361361371371371371381381381381381391390.00.0
Percentage of StockholdersEquity2.93.03.03.03.13.13.03.03.13.13.13.13.23.33.30.00.0
Percentage of Assets0.50.50.50.40.40.50.40.50.50.50.40.40.40.50.50.00.0
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value14591377129112291160112511661075969888791694592496401452415382349317290261245221206220208197187178173187187184180175175172168165168162153138
Percentage of StockholdersEquity30.929.828.127.025.925.525.823.821.720.117.915.713.611.69.523.021.520.318.818.016.715.414.713.412.720.421.420.519.619.018.838.939.137.236.535.839.639.138.538.339.237.735.834.8
Percentage of Assets5.04.64.34.03.83.73.83.63.23.02.52.21.91.61.32.72.72.62.52.32.22.02.11.91.82.82.82.72.62.62.60.04.95.04.84.45.65.45.55.35.65.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-292013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-302009-09-302008-09-30
Value-696.711-699.415-686.911-660.312-660.223-660.069-583.408-501.814-447.748-355.357-213.935-51.973-51.269-51.102-58.039-59.674-61.576-62.046-66.188-66.262-69.355-70.142-76.19-78.342-78.972-79.53-82.908-86.339-86.666-87.336-82.176-88.538-88.517-88.517-88.573-90.173-90.328-90.328-90.452-90.585-89.715-87.336-77.29-75.687
Percentage of StockholdersEquity-14.8-15.1-15.0-14.5-14.7-14.9-12.9-11.1-10.0-8.0-4.8-1.2-1.2-1.2-1.4-3.0-3.2-3.3-3.6-3.8-4.0-4.1-4.6-4.7-4.9-7.4-8.5-9.0-9.1-9.3-8.9-18.3-18.4-17.9-17.9-18.4-20.3-20.5-20.7-21.0-20.9-20.3-18.1-19.0
Percentage of Assets-2.4-2.3-2.3-2.2-2.1-2.2-1.9-1.7-1.5-1.2-0.7-0.2-0.2-0.2-0.2-0.4-0.4-0.4-0.5-0.5-0.5-0.5-0.6-0.7-0.7-1.0-1.1-1.2-1.2-1.3-1.20.0-2.3-2.4-2.3-2.2-2.9-2.8-2.9-2.9-3.0-2.90.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value2299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.02299000.01411000.01411000.01411000.01411000.01367000.01367000.01367000.01367000.01367000.01367000.0981000.0912000.0912000.0912000.0912000.0912000.0522000.0522000.0522000.0522000.0522000.0459000.0459000.0459000.0459000.0459000.0459000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value3753374537613761375537493766376237573751377637733769376637801590159215901597150415031501150615081507943858860859859856403403403402403357357357357357356
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.912.512.612.312.212.412.312.512.412.512.012.112.012.412.59.510.410.811.311.111.511.712.613.013.012.211.611.711.912.412.910.010.510.910.610.011.411.111.611.412.011.8

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value14591377129112291160112511661075969888791694592496401452415382349317290261245221206220208197187178173187187184180175175172168165168162
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.04.64.34.03.83.73.83.63.23.02.52.21.91.61.32.72.72.62.52.32.22.02.11.91.82.82.82.72.62.62.64.64.95.04.84.45.65.45.55.35.65.4

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value685784878867404540-6.61-65.945-118.675-99.581-79.044-26.166-13.659-16.368-23.721-26.6357.893104.159-12.124-0.825-13.201-4.739-10.251-11.459-7.772-14.285-19.465-15.33-17.6570.9194.6656.8996.6835.9857.6925.136-0.7745.124
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.20.30.30.30.20.10.20.1-0.0-0.2-0.4-0.3-0.3-0.1-0.1-0.1-0.2-0.20.10.10.0-0.1-0.0-0.1-0.1-0.1-0.2-0.1-0.2-0.3-0.4-0.50.00.10.20.20.20.20.2-0.00.2

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-09-30
Value69669968666066066058350144735521351515158596162666669707678787982868687828888888890909090908987
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.32.32.22.12.21.91.71.51.20.70.20.20.20.20.40.40.40.50.50.50.50.60.70.71.01.11.21.21.31.22.22.32.42.32.22.92.82.92.93.02.9

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value39242187171302.506941301041081061121126255616361122-23.328102-2.582631032-15.215-21.7415142299.0388.2161119-16.31-10.193146.726143.4149.935-3.584160.123
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating17.3103.677.270.012.10.932.144.134.735.034.136.437.022.320.042.447.549.199.8-19.789.2-2.459.910.145.8-22.8-31.976.064.548.917.124.234.759.9-49.2-33.849.923.750.912.335.6-12.957.50.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value387346558308-470.833222-739.46458-163.6661477-149.09247-937.565-223.1091014-1262.457-613.965-547.746-765.292-400.744-412.56-631.548-494.03-54.555123-211.662-114.863-156.426-301.513-237.426423-218.765-105.373-19.226-59.734-104.70738-34.118-191.08881-76.42543.321-3.488
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating168.1148.2230.2126.1-185.981.2-250.3155.2-54.1477.6-47.680.0-307.5-79.3367.0-866.5-457.3-434.7-621.8-339.2-360.9-595.8-465.1-52.8171.6-317.5-168.7-233.1-458.5-387.2803.0-645.3-323.3-59.3-180.2-347.7135.6-120.1-678.4292.0-273.6196.111.4-11.9

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-875.12241-878.397-366.99416-205.207428-385.89287-1710.066-53.556-270.96690544-997.413132557844555554682891341-4.203232928066310219-392.722214129-87.033-201.697441-30.20672-61.08315139-13.104-76.06251
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-380.017.8-362.1-150.0164.4-75.0144.9-130.729.1-552.7-17.1-87.7297.016.0-360.7910.0431.0353.9451.5462.371.9840.8321.8-4.132.4438.1118.299.1472.9357.8-745.0632.6398.4-268.5-608.51466.1-106.6256.0-216.9544.1140.8-47.1-261.7175.9

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-448.224630-132.556112-23.90719-216.45220229-123.855-95.8748880-115.575
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-194.6269.7-54.646.1-9.47.1-73.368.59.6-40.0-30.628.726.5-41.1

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value4.4494.5764.6924.8574.9075.0345.1195.0844.7334.995.1355.0155.1175.0825.0312.392.2352.0142.0932.0942.0862.1022.1442.111.5891.6331.4561.5471.5411.8021.6171.0430.8581.1841.1581.2580.9831.251.2552.2061.1111.4471.4131.478
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value39242187171302.506941301041081061121126255616361122-23.328102-2.582631032-15.215-21.7415142299.0388.2161119-16.31-10.193146.726143.4149.935-3.584160.123
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating17.3103.677.270.012.10.932.144.134.735.034.136.437.022.320.042.447.549.199.8-19.789.2-2.459.910.145.8-22.8-31.976.064.548.917.124.234.759.9-49.2-33.849.923.750.912.335.6-12.957.50.4

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9899768450141061229610111411911498-33.279444239403737233224-7.6461617161510-14.0025.3296.3766.5297.022.2616.2095.7015.717-0.4931.9393.5736.725.4034.756
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating42.742.431.534.520.15.236.141.531.932.836.638.737.535.1-12.030.831.631.033.331.733.022.430.923.4-10.625.225.024.322.816.8-26.615.719.620.121.27.521.920.120.3-1.86.912.923.118.415.6

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value98998450141229610111911498-33.288444239413737233224-7.6481617161510-14.0025.3296.3766.5297.022.2616.2095.7015.717-0.493
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating42.742.434.520.15.241.531.932.838.737.535.1-12.030.831.631.033.331.733.022.430.923.4-10.625.225.024.322.816.8-26.615.719.620.121.27.521.920.120.3-1.8
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value387346558308-470.833222-739.46458-163.6661477-149.09247-937.565-223.1091014-1262.457-613.965-547.746-765.292-400.744-412.56-631.548-494.03-54.555123-211.662-114.863-156.426-301.513-237.426423-218.765-105.373-19.226-59.734-104.70738-34.118-191.08881-76.42543.321-3.488
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating168.1148.2230.2126.1-185.981.2-250.3155.2-54.1477.6-47.680.0-307.5-79.3367.0-866.5-457.3-434.7-621.8-339.2-360.9-595.8-465.1-52.8171.6-317.5-168.7-233.1-458.5-387.2803.0-645.3-323.3-59.3-180.2-347.7135.6-120.1-678.4292.0-273.6196.111.4-11.9

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value9.2995.5885.6162.9333.1358.3744.8877.8267.4523.547.6467.2497.4931.6272.560.9742.4622.2631.9260.7820.4510.9961.9982.4913.2240.3344.3260.150.7860.9188.5720.170.7140.7150.7560.3790.6930.5520.2290.8430.530.7821.312.093
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-875.12241-878.397-366.99416-205.207428-385.89287-1710.066-53.556-270.96690544-997.413132557844555554682891341-4.203232928066310219-392.722214129-87.033-201.697441-30.20672-61.08315139-13.104-76.06251
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-380.017.8-362.1-150.0164.4-75.0144.9-130.729.1-552.7-17.1-87.7297.016.0-360.7910.0431.0353.9451.5462.371.9840.8321.8-4.132.4438.1118.299.1472.9357.8-745.0632.6398.4-268.5-608.51466.1-106.6256.0-216.9544.1140.8-47.1-261.7175.9

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value13131313131314141415
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-12-312012-12-312012-09-302011-12-312011-09-302010-09-30
Value0.027300.00.0818153921541590.00.00.00.00.0210.00.01.2443.279
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.00.00.0100.0100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value20.018.84.612.70.123-1.317-0.0010.210.1990.21900.1850.2180.230.1650.3250.3240.31200.3120.3280.3400.3250.3250.3250.330.2830.2870.308-0.332
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-09-302012-06-302011-09-30
Value11.1411.1411.1111.2611.1511.2511.2811.1811.211.1311.1311.1211.1511.1211.1110.9911.011.0810.9110.9910.9510.9310.9810.9611.110.5510.5410.7111.2612.2
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-312020-12-31
Value12.1311.4111.41
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice0.00.0102.4

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value30334363566267
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value7.07.07.01011110.00.00.00.00.00.00.00.00.00.00.0
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions


Unrecognized
Period End2020-12-312020-09-302020-06-302019-06-30
Value00123000.00
Percentage of UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions0.00.0100.00.0

stl:AccountsReceivableManagementFeesFactoringCommissionsAndOtherRelatedFees

stl:AccountsReceivableManagementFeesFactoringCommissionsAndOtherRelatedFees


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5.4915.4266.4985.3934.4195.5386.5726.0495.7945.4236.485.5955.3375.365.1334.7644.1373.769
Percentage of AccountsReceivableManagementFeesFactoringCommissionsAndOtherRelatedFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit

stl:AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value222000.0286000.0344000.0425000.0537000.0692000.0842000.0916000.0984000.01077000.01328000.01548000.01615000.01687000.01722000.0000
Percentage of AccretionAmortizationOfDiscountsAndPremiumsCertificatesOfDeposit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

stl:AccretionAmortizationofDiscountsandPremiumsLoans

stl:AccretionAmortizationofDiscountsandPremiumsLoans


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312014-12-312013-12-31
Value7.5127.9728.2618.8729.787102317232525272730333.6463.3873.482-0.435-0.364
Percentage of AccretionAmortizationofDiscountsandPremiumsLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:ChargeOffsFromTroubledDebtRestructurings

stl:ChargeOffsFromTroubledDebtRestructurings


Charge
Period End2020-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value7.60.00.00.00.00.00.00.0130.00.00.0
Percentage of ChargeOffsFromTroubledDebtRestructurings100.00.00.00.00.00.00.0100.00.00.00.0

stl:ConsumerLoanServicing

stl:ConsumerLoanServicing


Consumer
Period End2021-06-302021-03-312020-06-302020-03-31
Value1254000.0979000.01293000.01025000.0
Percentage of ConsumerLoanServicing100.0100.0100.0100.0

stl:DebtAndEquitySecuritiesCalledGainLoss

stl:DebtAndEquitySecuritiesCalledGainLoss


Debt
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-80000.00004880000.000
Percentage of DebtAndEquitySecuritiesCalledGainLoss100.00.00.00.0100.00.00.0

stl:DebtAndEquitySecuritiesRealizedGainLossSales

stl:DebtAndEquitySecuritiesRealizedGainLossSales


Debt
Period End2021-06-302021-03-312020-06-302020-03-31
Value0706000.0484000.08412000.0
Percentage of DebtAndEquitySecuritiesRealizedGainLossSales0.0100.0100.0100.0

stl:DebtSecuritiesAvailableForSaleRealizedGainFromCalls

stl:DebtSecuritiesAvailableForSaleRealizedGainFromCalls


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value16000.031000.0-29000.0004909000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainFromCalls100.0100.0100.00.00.0100.0

stl:DebtSecuritiesAvailableForSaleRealizedGainLossSecuritiesCalled

stl:DebtSecuritiesAvailableForSaleRealizedGainLossSecuritiesCalled


Debt
Period End2021-06-302021-03-312020-06-302020-03-31
Value-80000.018000.004897000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLossSecuritiesCalled100.0100.00.0100.0

stl:DebtSecuritiesAvailableForSaleRealizedLossFromCalls

stl:DebtSecuritiesAvailableForSaleRealizedLossFromCalls


Debt
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value96000.018000.00029000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedLossFromCalls100.0100.00.00.0100.0

stl:DebtSecuritiesHeldToMaturityRealizedGainLossSecuritiesCalled

stl:DebtSecuritiesHeldToMaturityRealizedGainLossSecuritiesCalled


Debt
Period End2021-06-302021-03-312020-06-302020-03-31
Value0-5000.00-17000.0
Percentage of DebtSecuritiesHeldToMaturityRealizedGainLossSecuritiesCalled0.0100.00.0100.0

stl:DebtSecuritiesHeldToMaturitySoldRealizedGain

stl:DebtSecuritiesHeldToMaturitySoldRealizedGain


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value01809000.004909000.000
Percentage of DebtSecuritiesHeldToMaturitySoldRealizedGain0.0100.00.0100.00.00.0

stl:DebtSecuritiesHeldToMaturitySoldRealizedLoss

stl:DebtSecuritiesHeldToMaturitySoldRealizedLoss


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value01039000.0029000.000
Percentage of DebtSecuritiesHeldToMaturitySoldRealizedLoss0.0100.00.0100.00.00.0

stl:EffectiveIncomeTaxRateReconciliationFDICInsurancePremiumLimitation

stl:EffectiveIncomeTaxRateReconciliationFDICInsurancePremiumLimitation


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value148000.0257000.0181000.0266000.0315000.0256000.0260000.0239000.0224000.0254000.0294000.0466000.0531000.0486000.00000
Percentage of EffectiveIncomeTaxRateReconciliationFDICInsurancePremiumLimitation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

stl:EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmortizationExpenseAmount

stl:EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmortizationExpenseAmount


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11119.7248.1838.9877.4014.2084.6274.0733.816.6550.00.00.998
Percentage of EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmortizationExpenseAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

stl:EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmount

stl:EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmount


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1313119.461108.4624.9755.4314.8144.3473.6110.4011.3751.1271.4560.1390.1380.1390.1170.1180.180.0540.0540.0530.0540.0540.220.0530.3980.0550.0
Percentage of EffectiveIncomeTaxRateReconciliationTaxCreditLowIncomeHousingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

stl:EffectiveIncomeTaxRateReconciliationTaxExpenseBenefitCARESActNetOperatingLossCarryback

stl:EffectiveIncomeTaxRateReconciliationTaxExpenseBenefitCARESActNetOperatingLossCarryback


Effective
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value00-21313000.000
Percentage of EffectiveIncomeTaxRateReconciliationTaxExpenseBenefitCARESActNetOperatingLossCarryback0.00.0100.00.00.0

stl:EffectiveIncomeTaxReconciliationNondeductibleExpenseRestrictedStockVestingSection162mLimitation

stl:EffectiveIncomeTaxReconciliationNondeductibleExpenseRestrictedStockVestingSection162mLimitation


Effective
Period End2021-06-302021-03-31
Value161000.0517000.0
Percentage of EffectiveIncomeTaxReconciliationNondeductibleExpenseRestrictedStockVestingSection162mLimitation100.0100.0

stl:EffectiveIncomeTaxReconciliationUncertainTaxPositionsAmount

stl:EffectiveIncomeTaxReconciliationUncertainTaxPositionsAmount


Effective
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value0.00.0110.00.0
Percentage of EffectiveIncomeTaxReconciliationUncertainTaxPositionsAmount0.00.0100.00.00.0

stl:EmployeeStockOwnershipPlanESOPAndStockBasedCompensationExpense

stl:EmployeeStockOwnershipPlanESOPAndStockBasedCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6.7816.6175.2225.8695.9136.0065.184.5654.6055.1233.683.1153.3362.8542.5091.9691.8971.7361.5581.6731.7471.541.2811.0641.1281.1091.1461.0060.780.9270.991
Percentage of EmployeeStockOwnershipPlanESOPAndStockBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:FeesAndCommissionsLoans

stl:FeesAndCommissionsLoans


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value8.76210137.298.003118.6986.2855.3083.8384.0674.1424.5663.4062.9942.8192.8362.987
Percentage of FeesAndCommissionsLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:FinancingReceivableAllowanceForCreditLossSold us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

stl:FinancingReceivableAllowanceForCreditLossSold

us-gaap:NonperformingFinancingReceivable, us-gaap:CommercialPortfolioSegment, us-gaap:CommercialRealEstate


Financing
Period End2021-06-30
Value11
Percentage of FinancingReceivableAllowanceForCreditLossSold100.0

stl:FinancingReceivableAllowanceForCreditLossTroubledDebtRestructuringsDefaults

stl:FinancingReceivableAllowanceForCreditLossTroubledDebtRestructuringsDefaults


Financing
Period End2020-12-31
Value5.4
Percentage of FinancingReceivableAllowanceForCreditLossTroubledDebtRestructuringsDefaults100.0

stl:FinancingReceivableInterestAndFeeIncome

stl:FinancingReceivableInterestAndFeeIncome


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value201205214213219235256254
Percentage of FinancingReceivableInterestAndFeeIncome100.0100.0100.0100.0100.0100.0100.0100.0

stl:FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementLocation

stl:FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:AssetBasedLending, us-gaap:InterestIncome


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value67000.00067000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome100.00.00.0100.0

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:CommercialAndIndustrial, us-gaap:InterestIncome


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value2000.036000.0115000.012000.042000.07000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome0.00.0171.60.00.010.4

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:EquipmentFinancingReceivables, us-gaap:InterestIncome


Financing
Period End2021-06-302021-03-312020-12-31
Value49000.038000.060000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome0.00.089.6

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, stl:AcquisitionDevelopmentAndConstruction, us-gaap:InterestIncome


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value297000.000297000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome443.30.00.0443.3

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, us-gaap:CommercialRealEstate, us-gaap:InterestIncome


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value264000.07000.0922000.0609000.0142000.0146000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome0.00.01376.10.00.0217.9

stl:FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:IncomeStatementLocation

us-gaap:ConsumerPortfolioSegment, us-gaap:InterestIncome


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value12000.019000.043000.015000.007000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome0.00.064.20.00.010.4

us-gaap:ResidentialPortfolioSegment, us-gaap:InterestIncome


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value53000.0173000.0539000.0111000.099000.080000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome0.00.0804.50.00.0119.4

stl:FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome us-gaap:IncomeStatementLocation

us-gaap:InterestIncome


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value380000.0273000.02198000.0761000.0367000.0631000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome0.00.03280.60.00.0941.8

stl:FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementLocation

srt:Multifamily, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, us-gaap:RealEstateLoan, us-gaap:InterestIncome


Financing
Period End2020-12-312020-09-302020-06-302020-03-31
Value155000.014000.084000.027000.0
Percentage of FinancingReceivablesAccruedInterestReceivableReversedAgainstNetIncome231.30.00.040.3

stl:IncomeTaxReconciliationBankOwnedLifeInsuranceIncome

stl:IncomeTaxReconciliationBankOwnedLifeInsuranceIncome


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1043000.01004000.01048000.01122000.01034000.01111000.0860000.02441000.0893000.0769000.0873000.0861000.0782000.0763000.01181000.0462000.0560000.0462000.0-415000.0-643000.0-430000.0-445000.0-739000.0-423000.0-440000.0-251000.0-341000.0-270000.0-391000.0-190000.0-259000.0
Percentage of IncomeTaxReconciliationBankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:InsuranceandSuretyBondPremiumExpense

stl:InsuranceandSuretyBondPremiumExpense


Insuranceand
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1044000.0914000.01627000.0942000.01158000.01091000.0781000.0982000.01006000.01062000.0950000.01299000.0810000.0571000.01252000.0841000.0687000.0537000.0647000.0821000.0897000.0785000.0896000.01161000.0481000.0648000.0595000.0675000.0676000.0637000.0675000.0
Percentage of InsuranceandSuretyBondPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:MergerPercentageOfOwnershipAfterTransaction dei:LegalEntity, us-gaap:SubsequentEventType

stl:MergerPercentageOfOwnershipAfterTransaction

stl:Sterling, us-gaap:SubsequentEvent


Merger
Period End2021-04-19
Value49.6
Percentage of MergerPercentageOfOwnershipAfterTransaction100.0

stl:WebsterFinancialCorporation, us-gaap:SubsequentEvent


Merger
Period End2021-04-19
Value50.4
Percentage of MergerPercentageOfOwnershipAfterTransaction101.6

stl:MergerRelatedExpense

stl:MergerRelatedExpense


Merger
Period End2021-06-30
Value2481000.0
Percentage of MergerRelatedExpense100.0

stl:MergerTerminationFee us-gaap:StatementScenario

stl:MergerTerminationFee

srt:ScenarioForecast


Merger
Period End2021-04-19
Value185
Percentage of MergerTerminationFee100.0

stl:NetChargeOffsToAverageGrossLoansAnnualized

stl:NetChargeOffsToAverageGrossLoansAnnualized


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.280.25-0.021.270.00320.001300.00270.00120.0014-0.00010.00080.00180.00180.00020.00120.00050.000500.00090.0010.00060.00020.00090.00130.00130.0010.00090.00150.00340.0014-0.00050.00540.00580.0058
Percentage of NetChargeOffsToAverageGrossLoansAnnualized100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:OperatingLeaseDepreciationExpense

stl:OperatingLeaseDepreciationExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value2.9173.1243.133.133.1363.4920.00.0
Percentage of OperatingLeaseDepreciationExpense100.0100.0100.0100.0100.0100.00.00.0

stl:OperationalLoss

stl:OperationalLoss


Operational
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value601000.0593000.0618000.0597000.0609000.0605000.0617000.0536000.01907000.0583000.0231000.0791000.0806000.01275000.0891000.0130000.00255000.0
Percentage of OperationalLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

stl:OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldToMaturityArisingDuringPeriodbeforeTax

stl:OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldToMaturityArisingDuringPeriodbeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value40000.045000.0108000.0131000.059000.097000.0117000.0119000.0122000.02417000.0222000.0225000.0227000.0234000.0243000.0238000.0245000.0243000.0230000.0542000.0775000.0-74000.0292000.0296000.0285000.0539000.0310000.0277000.0306000.0313000.0-9841000.0
Percentage of OtherComprehensiveIncomeLossUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldToMaturityArisingDuringPeriodbeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:OtherNoninterestExpenseMiscellaneous

stl:OtherNoninterestExpenseMiscellaneous


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value5.0694.8581.4165.3779.4317.2292.7296.627.6878.1919.4955.3255.0644.2179.8223.9174.4113.4994.1034.3714.915
Percentage of OtherNoninterestExpenseMiscellaneous100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:OtherRealEstateOwnedIncomeExpenseNet

stl:OtherRealEstateOwnedIncomeExpenseNet


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value-72000.0-68000.0283000.0151000.01233000.052000.0-132000.079000.0458000.0217000.015000.01497000.0-226000.0364000.0741000.0894000.0112000.01676000.0207000.0721000.0541000.0582000.087000.0183000.040000.0-37000.0-81000.0368000.0
Percentage of OtherRealEstateOwnedIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:PaymentsForLoanOriginations

stl:PaymentsForLoanOriginations


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value4792593339-21.821457317200134-197.129272-86.29715426346716939441436812132726053514398-790.7476561189.78-507.78322
Percentage of PaymentsForLoanOriginations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:PaymentsOfShortTermFHLBankBorrowingsFinancingActivities

stl:PaymentsOfShortTermFHLBankBorrowingsFinancingActivities


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.03820.015540-195.0840-607.0754-295.0-487.0
Percentage of PaymentsOfShortTermFHLBankBorrowingsFinancingActivities0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:PaymentstoAcquireAffordableHousingTaxCredit

stl:PaymentstoAcquireAffordableHousingTaxCredit


Paymentsto
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value149.286101318453230293.602170.01.5922.0636.0243.1552.9052.20.00.00.00.00.00.00.0
Percentage of PaymentstoAcquireAffordableHousingTaxCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

stl:PortfolioLoansRepaymentsOriginationsNet

stl:PortfolioLoansRepaymentsOriginationsNet


Portfolio
Period End2021-06-302021-03-312020-06-302020-03-31
Value291585-593.084-339.73
Percentage of PortfolioLoansRepaymentsOriginationsNet100.0100.0100.0100.0

stl:ProceedsFromCallsOfAvailableForSaleSecurities

stl:ProceedsFromCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value172.025110.00.01380.00.0
Percentage of ProceedsFromCallsOfAvailableForSaleSecurities100.0100.0100.00.00.0100.00.00.0

stl:ProceedsFromCallsOfHeldToMaturitySecurities

stl:ProceedsFromCallsOfHeldToMaturitySecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0925000.04740000.000905000.000
Percentage of ProceedsFromCallsOfHeldToMaturitySecurities0.0100.0100.00.00.0100.00.00.0

stl:ProceedsFromMaturitiesAndPrepaymentsOfDebtSecuritiesAvailableForSale

stl:ProceedsFromMaturitiesAndPrepaymentsOfDebtSecuritiesAvailableForSale


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1191341821811766411716810771
Percentage of ProceedsFromMaturitiesAndPrepaymentsOfDebtSecuritiesAvailableForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:ProceedsFromMaturitiesAndPrepaymentsOfHeldToMaturitySecurities

stl:ProceedsFromMaturitiesAndPrepaymentsOfHeldToMaturitySecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value16173648231712304617
Percentage of ProceedsFromMaturitiesAndPrepaymentsOfHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:ResidentialLoanServicing

stl:ResidentialLoanServicing


Residential
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1353000.01361000.01247000.01377000.01411000.01524000.01383000.01608000.0
Percentage of ResidentialLoanServicing100.0100.0100.0100.0100.0100.0100.0100.0

stl:ResidentialMortgageLoanServicing

stl:ResidentialMortgageLoanServicing


Residential
Period End2021-06-302021-03-312020-06-302020-03-31
Value1303000.01449000.01247000.01377000.0
Percentage of ResidentialMortgageLoanServicing100.0100.0100.0100.0

stl:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpirationsWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

stl:SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpirationsWeightedAverageGrantDateFairValue

stl:NonvestedStockAwardsandPerformanceUnits, stl:RecognitionAndRetentionPlan


Sharebased
Period End2021-06-302021-03-31
Value020.85
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExpirationsWeightedAverageGrantDateFairValue0.0100.0

stl:TaxExpenseBenefitOfSecuritiesCallsNetGains

stl:TaxExpenseBenefitOfSecuritiesCallsNetGains


Tax
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value-16000.02000.00-244000.0854000.0
Percentage of TaxExpenseBenefitOfSecuritiesCallsNetGains100.0100.00.0100.0100.0

stl:TaxExpenseBenefitOfSecuritiesGains

stl:TaxExpenseBenefitOfSecuritiesGains


Tax
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value7000.0131000.0-23000.0-27000.061000.01472000.0-1450000.01445000.0-111000.0-3644000.0-1737000.0-1000.0-93000.0-1260000.0-2000.0-7000.0-75000.0-7000.0-90000.01141000.01466000.0
Percentage of TaxExpenseBenefitOfSecuritiesGains100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:TaxExpenseHeldToMaturitySecurityGains

stl:TaxExpenseHeldToMaturitySecurityGains


Tax
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value162000.00-854000.00000-6000.0-11000.0-5000.0000000007000.009000.0
Percentage of TaxExpenseHeldToMaturitySecurityGains100.00.0100.00.00.00.00.0100.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-7991000.0-7601000.0-7480000.0-7533000.0-7823000.0-7978000.0-7866000.0-8049000.0-9134000.0-9060000.0-9226000.0-10737000.0-9508000.0-9514000.0-7426000.0-5545000.0-5545000.0-5545000.0-4924000.0-4278000.0-3494000.0-3328000.0-2451000.0-1155000.0-1155000.0-1155000.0-694000.0-793000.0-795000.0-1077000.0-511000.0-4409000.0573000.02533000.0-765000.0878000.01594000.0-789000.0-677000.0-863000.02396000.0-690000.0-4024000.03365000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet


Adjustment
Period End2021-03-312020-03-31
Value-6.635-4.413
Percentage of AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet100.0100.0

us-gaap:AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustment
Period End2021-03-312020-03-31
Value-23.241-24.516
Percentage of AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet350.3555.5

us-gaap:RetainedEarnings


Adjustment
Period End2021-03-312020-03-31
Value2.74614
Percentage of AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet-41.4-321.5

us-gaap:TreasuryStock


Adjustment
Period End2021-03-312020-03-31
Value135.916
Percentage of AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet-208.9-134.1

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-31
Value-0.0266.6350.1914.413
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-31
Value-0.07230.1824
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation269.2350.394.2555.5

us-gaap:RetainedEarnings


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.001-2.746-0.005-14.187
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation-3.8-41.4-2.6-321.5

us-gaap:TreasuryStock


Adjustments
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.043-13.860.016-5.916
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation-165.4-208.98.4-134.1

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther us-gaap:ConsolidatedEntities

us-gaap:AdjustmentsToAdditionalPaidInCapitalOther

srt:Subsidiaries


Adjustments
Period End2020-12-31
Value175
Percentage of AdjustmentsToAdditionalPaidInCapitalOther100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1829000.0752000.095000.0101000.0414000.0508000.01834000.055000.0156000.075000.0331000.01390000.0113000.0731000.0493000.01031000.02372000.0918000.0861000.01104000.0774000.0549000.02735000.01824000.0546000.0716000.01277000.01244000.0195000.0172000.0230000.0160000.0110000.0159000.0119000.0133000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-1243000.0-624000.05000.06000.068000.0141000.0424000.06000.0-10000.0-18000.0-46000.0-314000.0-29000.0-298000.0-109000.0-114000.0-961000.025000.0-148000.0691000.059000.0-102000.072000.0364000.0-42000.0-597000.0211000.0-2000.0-4000.00-29000.000
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions-68.0-83.05.35.916.427.823.110.9-6.4-24.0-13.9-22.6-25.7-40.8-22.1-11.1-40.52.7-17.262.67.6-18.62.620.0-7.7-83.416.5-0.2-2.10.0-12.60.00.0

us-gaap:TreasuryStock


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value3072000.01376000.090000.095000.0346000.0367000.01410000.049000.0164000.091000.0375000.01701000.094000.0980000.0553000.01087000.03232000.0768000.0807000.0239000.0509000.0370000.02384000.01132000.0366000.0699000.01179000.01089000.023000.0072000.000
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions168.0183.094.794.183.672.276.989.1105.1121.3113.3122.483.2134.1112.2105.4136.383.793.721.665.867.487.262.167.097.692.387.511.80.031.30.00.0

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value11119.7248.1838.9877.4014.2084.6274.0733.812.9231.7370.9970.9980.6530.1380.1380.1380.1460.130.2120.0480.0480.0480.0480.050.0460.520.0
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfDebtDiscountPremium


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value156000.0207000.0471000.0104000.0-302000.0-144000.0-329000.0-406000.0-374000.0-431000.0-667000.0-456000.0-30000.0-595000.0-266000.0138000.0138000.0134000.0-87000.0880000.0163000.097000.0-375000.0141000.067000.086000.0-69000.0-289000.0-244000.075000.087000.0367000.0-88000.0-123000.0-69000.0-68000.0001000.0-61000.063000.0-21000.0-11000.0-434000.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2021-06-302021-03-312020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.4750.6330.00.00.0148.7360.00.02.4852.4850.0280.3120.610.02.3210.09.3020.00.0
Percentage of AssetImpairmentCharges100.0100.00.00.00.0100.0100.00.00.0100.0100.00.0100.0100.0100.00.0100.00.0100.00.00.0

us-gaap:BankOwnedLifeInsuranceIncome

us-gaap:BankOwnedLifeInsuranceIncome


Bank
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value4.9814.9554.9615.3634.955.0184.778.0664.1923.6414.063.7334.2433.6143.4741.321.6521.371.3331.8911.2811.3271.7921.2931.0741.0761.0240.7910.820.7290.740.5020.4960.4910.5090.5120.5180.5020.5180.5140.4880.5530.4940.4910.503
Percentage of BankOwnedLifeInsuranceIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Communication

us-gaap:Communication


Communication
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1323000.01427000.01304000.01424000.01320000.01630000.01569000.01511000.01710000.01895000.01951000.01238000.01703000.01558000.01595000.0589000.0537000.0
Percentage of Communication100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesGainLoss

us-gaap:DebtAndEquitySecuritiesGainLoss


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-111000.0642000.0485000.08412000.0-75000.06882000.0-528000.0-13184000.0-4886000.0-56000.0-425000.0-5421000.0-70000.0-21000.0-230000.0
Percentage of DebtAndEquitySecuritiesGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss

us-gaap:DebtAndEquitySecuritiesRealizedGainLoss


Debt
Period End2021-06-302021-03-312020-06-302020-03-31
Value-13000.0719000.0485000.08412000.0
Percentage of DebtAndEquitySecuritiesRealizedGainLoss100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:CreditFacility, us-gaap:LongtermDebtType, us-gaap:VariableRate

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

us-gaap:RevolvingCreditFacility, us-gaap:LineOfCredit, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2020-08-312019-03-312018-03-312016-06-282016-03-31
Value1.250.01250.01250.01250.0125
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.01.2360.0020.00.4858.48127.8150.04.3550.1370.00.0810.0010.0010.0010.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGain0.0100.0100.00.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.00.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLoss


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value0004897000.000
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLoss0.00.00.0100.00.00.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.00.530.1130.1280.00.068190.9330.528175.0230.0030.4855.4220.0710.0220.23
Percentage of DebtSecuritiesAvailableForSaleRealizedLoss0.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal


Debt
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value-750000.00-1000000.001703000.000
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal100.00.0100.00.0100.00.00.0

us-gaap:DebtSecuritiesHeldToMaturityCreditLossExpenseReversal us-gaap:FinancialInstrument

stl:CorporateDebtSecuritiesAndOtherInvestmentSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-76000.05000.05000.0007000.0
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal10.10.00.0-0.00.00.4

us-gaap:USStatesAndPoliticalSubdivisions


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-674000.0-5000.0-5000.0-1000000.001696000.0
Percentage of DebtSecuritiesHeldToMaturityCreditLossExpenseReversal89.90.00.0100.00.099.6

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value13131313131414151515159.4579.4549.436
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value13131313131414151515159.4579.4549.436
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash

us-gaap:DividendsPreferredStockCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2193000.02194000.02194000.02193000.02194000.06581000.02194000.02194000.02194000.02194000.02193000.02194000.0
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash us-gaap:StatementEquityComponents

us-gaap:PreferredStock


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value234000.0231000.0225000.0221000.0218000.0212000.0207000.0205000.0201000.0197000.0195000.0
Percentage of DividendsPreferredStockCash10.710.510.310.19.99.79.49.39.29.08.9

us-gaap:RetainedEarnings


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value1959000.01963000.01969000.01972000.01976000.01982000.01987000.01989000.01993000.01996000.01999000.0
Percentage of DividendsPreferredStockCash89.389.589.789.990.190.390.690.790.891.091.1

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount


Effective
Period End2021-06-302021-03-312020-06-302020-03-31
Value-300000.0-152000.0287000.0491000.0
Percentage of EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1322000.01224000.02608000.0734000.0739000.01051000.01087000.0959000.0967000.01127000.0773000.0654000.0751000.0665000.0328000.0640000.0617000.0564000.0466000.0557000.0573000.0524000.0690000.068000.088000.0377000.0378000.0219000.00244000.0279000.0542000.000
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value2.3443.232.8653.3323.6383.2063.1343.1942.9943.3383.6086.0435.4955.3475.7372.312.0341.8881.5312.1512.32.2582.2872.2811.3841.4281.5681.6191.7951.5671.1640.6640.8750.7530.7180.8430.7820.7430.7280.6360.5870.9190.768
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value14122770176.955135.7966.917
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

stl:AcquisitionDevelopmentAndConstruction


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.05.00.3070.00.001-0.1020.0060.00.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery0.038.71.10.00.0-1.50.00.00.0

stl:AssetBasedLending


Financing
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-1.9980.01.2971.50.9859.5773.5510.0
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery-14.00.01.88.514.270.361.30.0

stl:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.560.559170.4123.872-0.177-0.0130.3094.7
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery3.94.364.20.622.0-2.5-0.15.367.9

stl:EquipmentFinancingReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.2851.5543.228417.4763.6882.2891.2561.118
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery16.012.011.858.642.653.016.821.716.2

stl:FactoredReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.709-0.4021.9776.7083.730.0030.0110.023-0.089
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery5.0-3.17.29.521.20.00.10.4-1.3

stl:Multifamilyfinancing


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value4.9673.230.430.00.1530.0-0.09-0.006-0.103
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery34.725.01.60.00.90.0-0.7-0.1-1.5

stl:PayrollFinance


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.082-0.0020.692-0.2620.559-0.009-0.0080.081-0.001
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery0.6-0.02.5-0.43.2-0.1-0.11.4-0.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7.2782.4463.0923.65-0.5731.215-0.134-0.4110.008
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery50.818.911.35.2-3.317.5-1.0-7.10.1

us-gaap:ConsumerLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.1930.2990.0320.0760.1410.280.1330.3050.2
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery1.32.30.10.10.84.01.05.32.9

us-gaap:ResidentialMortgage


Financing
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.2370.23170.7021.0721.8580.6881.084
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery1.71.824.64.015.413.611.915.7

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

stl:EquipmentFinancingReceivables, stl:NonPerformingResidentialMortgageLoansSold


Financing
Period End2020-09-30
Value17
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery24.2

stl:EquipmentFinancingReceivables, stl:SmallBalanceTransportationFinanceLoansSold


Financing
Period End2020-09-30
Value40
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery57.3

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value3511000.02346000.0776000.01961000.01121000.02883000.0537000.01080000.01349000.0748000.01530000.01202000.0638000.0476000.0410000.0433000.01001000.0626000.0591000.0673000.0531000.0635000.01267000.01139000.0301000.0382000.0668000.01071000.0211000.0115000.0569000.0260000.0284000.0662000.0296000.0855000.0485000.0164000.01058000.0134000.0153000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

stl:AcquisitionDevelopmentAndConstruction


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value000105000.00000000000133000.0136000.000104000.0043000.0009000.000000
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.00.00.03.60.00.00.00.00.00.00.00.00.00.013.321.70.00.019.60.03.40.00.02.40.00.00.00.00.0

stl:AssetBasedLending


Financing
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value1998000.0000000009000.0001000.01000.03000.00046000.016000.0-40000.04000.00
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery56.90.00.00.00.00.00.00.00.01.40.00.00.20.10.50.00.08.72.5-3.20.40.0

stl:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value588000.0468000.0194000.0677000.0116000.0475000.0232000.0136000.0445000.0139000.0406000.0235000.0225000.0214000.0164000.0316000.0523000.0139000.0152000.0381000.0199000.0329000.0675000.0781000.0163000.0101000.0638000.0419000.079000.074000.0501000.0100000.063000.0127000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery16.719.925.034.510.316.543.212.633.018.626.519.635.345.040.073.052.222.225.756.637.551.853.368.654.226.495.539.137.464.388.038.522.219.2

stl:EquipmentFinancingReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value719000.0854000.0217000.0816000.0387000.01105000.091000.0422000.079000.0131000.0604000.085000.0190000.072000.056000.045000.0146000.0140000.0227000.0123000.0102000.0108000.0409000.0148000.096000.0172000.00194000.000
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery20.536.428.041.634.538.316.939.15.917.539.57.129.815.113.710.414.622.438.418.319.217.032.313.031.945.00.018.10.00.0

stl:FactoredReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value52000.0406000.0122000.0185000.01000.04000.09000.03000.04000.0121000.08000.02000.02000.03000.005000.02000.016000.010000.010000.017000.024000.014000.018000.09000.019000.009000.000
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery1.517.315.79.40.10.11.70.30.316.20.50.20.30.60.01.20.22.61.71.53.23.81.11.63.05.00.00.80.00.0

stl:Multifamilyfinancing


Financing
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value15000.0001000.00105000.090000.06000.0103000.0276000.04000.003000.000000002000.09000.0000092000.0000
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.40.00.00.10.019.68.30.413.818.00.30.00.60.00.00.00.00.00.00.00.30.70.00.00.00.08.60.00.00.0

stl:PayrollFinance


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4000.02000.038000.0262000.01000.09000.05000.08000.03000.01000.09000.05000.07000.022000.05000.01000.0000028000.04000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.10.14.913.40.10.30.90.70.20.10.60.41.14.61.20.20.00.00.00.05.30.6

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value97000.0487000.0174000.00584000.060000.00187000.0649000.09000.0186000.0612000.074000.016000.046000.017000.098000.02000.0168000.0111000.053000.021000.056000.076000.0016000.01000.03000.0102000.019000.037000.017000.0148000.0331000.081000.0123000.04000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery2.820.822.40.052.12.10.017.348.11.212.250.911.63.411.23.99.80.328.416.510.03.34.46.70.04.20.10.348.316.56.56.552.150.027.414.40.8

us-gaap:ConsumerLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value38000.092000.030000.021000.031000.01125000.090000.0108000.0162000.0243000.031000.0254000.097000.0131000.0137000.048000.088000.041000.033000.048000.027000.0119000.037000.035000.024000.052000.027000.040000.029000.021000.024000.0126000.036000.031000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery1.13.93.91.12.839.016.810.012.032.52.021.115.227.533.411.18.86.55.67.15.118.72.93.18.013.64.03.713.718.34.248.512.74.7

us-gaap:ResidentialMortgage


Financing
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value037000.000126000.01000.01000.05000.034000.015000.0
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.01.60.00.011.70.10.10.45.33.2

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value17152872189.8389.619147.1457.6657.7185.3639.7049.2916.6313.4562.2891.8091.8742.6332.681.7664.2332.8451.9681.9721.9062.1591.8263.5121.8342.4573.3543.8323.4143.662.9973.4722.68104.498
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

stl:AcquisitionDevelopmentAndConstruction


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.05.00.3070.00.0010.0030.00.0060.00.00.00.00.7210.00.00.0050.0220.00.00.00.00.00.00.00.00.00.4880.0011.260.00.218
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.032.81.10.00.00.00.00.00.00.00.00.07.40.00.00.11.00.00.00.00.00.00.00.00.00.025.60.069.00.011.9

stl:AssetBasedLending


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value0.01.2971.50.9855.8569.5773.5510.04.9360.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.01.88.010.060.965.149.70.064.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

stl:CommercialAndIndustrial


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.1481.027171.0893.9880.2980.470.1230.7544.8390.4523.4151.8313.5724.570.0680.1640.6870.2190.570.4290.4890.2810.2240.2280.8420.7330.240.8911.1640.5280.6060.230.359
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs6.46.763.11.521.33.04.90.810.663.15.963.718.938.468.92.07.238.011.721.616.027.76.67.911.642.738.511.148.833.128.824.76.99.4

stl:EquipmentFinancingReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3.0042.4083.445427.8634.7931.7392.7111.3351.2491.060.8292.4774.1991.3430.7410.610.4710.5760.3770.5720.4571.4631.3690.4380.1530.00.4510.3340.167
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs16.915.812.358.142.148.718.118.418.716.313.715.525.545.220.321.426.626.030.714.321.325.934.648.122.37.80.020.918.34.8

stl:FactoredReceivables


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.7610.0042.0996.8933.7310.0070.0680.0140.0270.0320.0240.0180.160.0030.1110.5640.0120.2960.2670.060.7920.0810.0210.0520.1460.0720.00.0430.0790.289
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs4.30.07.59.520.00.10.70.10.40.40.30.31.60.01.716.30.516.414.22.329.64.60.51.87.43.70.02.04.38.2

stl:Multifamilyfinancing


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4.9823.230.430.00.1540.00.00.00.00.00.140.1680.00.00.00.00.00.00.00.3990.0180.00.00.00.00.0170.00.00.00.00.418
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs28.021.21.50.00.80.00.00.00.00.01.83.10.00.00.00.00.00.00.015.20.70.00.00.00.00.90.00.00.00.022.8

stl:PayrollFinance


Financing
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0860.730.00.560.00.1680.00.0840.00.0210.0020.3140.00.00.1880.00.00.00.00.0280.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.52.60.03.00.01.70.01.20.00.30.03.20.00.05.40.00.00.00.01.00.0

us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value7.3752.9333.2663.650.0111.2750.5830.0530.2380.0170.0570.3593.1661.3530.0071.3450.9440.0830.2250.630.10.0041.1340.2230.2760.0620.1720.1350.0730.280.6711.2641.0341.1990.2280.3910.655
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs41.419.211.65.00.113.06.10.43.30.20.76.732.614.60.138.941.24.612.023.93.70.226.87.814.03.19.06.34.08.036.651.430.831.36.710.721.9

us-gaap:ConsumerLoan


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.2310.3910.0620.0970.1721.4050.4010.2410.4670.4430.3340.4580.4910.1250.4080.1560.4170.1140.3130.2590.5320.5110.810.3870.8210.3420.2030.1130.3220.2040.1470.2470.5310.748
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs1.32.60.20.10.914.34.21.66.55.84.38.55.11.36.24.518.26.316.79.819.928.919.113.641.717.310.75.217.65.88.010.115.819.5

us-gaap:ResidentialMortgage


Financing
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value0.2370.267170.7021.0721.9840.6891.0850.1140.5440.039
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs1.31.723.93.810.913.59.614.22.15.60.4

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.0254.8794.943282.2333.1855.9212.1922010140.731230.3125.848-0.1220.00.00.4690.00.00.00.00.01.060.01.163.4183.2184.9482.8454.684
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2 us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:AssetBasedLending


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value0.00.04.8794.9430.00.00.00.0-11.490.00.00.0
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.0100.0100.00.00.00.00.0-524.20.00.00.0

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:EquipmentFinancingReceivables


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.7730.00.02.6892.233-2.225.0260.02.6370.00.670.2490.0-0.0013.089
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.03.10.00.09.6100.0-69.784.90.012.80.04.834.10.0-0.352.8

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, us-gaap:CommercialRealEstate


Financing
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0150.0120.00.00.00.00.01.724
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.055.70.059.00.00.00.00.00.029.5

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value0.0255.614.943283.0683.1855.9212.772011141.058230.3135.8480.00.00.00.4690.00.00.00.00.01.060.01.2243.4183.2184.9482.834.9
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2 us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:AssetBasedLending


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-30
Value0.00.05.614.9430.00.00.00.0-10.9120.00.00.0
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.00.0100.0100.00.00.00.00.0-393.90.00.00.0

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:EquipmentFinancingReceivables


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.01.0270.00.02.6893.068-2.225.0260.02.6370.00.670.470.00.03.088
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.04.10.00.09.6100.0-69.784.90.012.80.04.744.40.00.052.8

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, us-gaap:CommercialRealEstate


Financing
Period End2020-12-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.0150.0120.00.00.00.00.01.724
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment20.055.70.059.00.00.00.00.00.029.5

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.00.490.10.20.2999999999999981616
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableReclassificationToHeldForSale

us-gaap:FinancingReceivableReclassificationToHeldForSale


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value1291064611590.0950.00.0
Percentage of FinancingReceivableReclassificationToHeldForSale100.0100.0100.0100.00.0100.00.00.0

us-gaap:FinancingReceivableSignificantSales

us-gaap:FinancingReceivableSignificantSales


Financing
Period End2021-06-30
Value11
Percentage of FinancingReceivableSignificantSales100.0

us-gaap:FinancingReceivableSignificantSales us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:NonperformingFinancingReceivable, us-gaap:CommercialPortfolioSegment, us-gaap:CommercialRealEstate


Financing
Period End2021-06-302021-03-31
Value12270
Percentage of FinancingReceivableSignificantSales1103.60.0

us-gaap:FinancingReceivableSignificantSales us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

stl:EquipmentFinancingReceivables, stl:SmallBalanceTransportationFinanceLoansSold


Financing
Period End2020-09-302020-03-31
Value10695
Percentage of FinancingReceivableSignificantSales0.00.0

us-gaap:ResidentialMortgage, stl:NonPerformingResidentialMortgageLoansSold


Financing
Period End2020-09-30
Value53
Percentage of FinancingReceivableSignificantSales0.0

us-gaap:GainLossOnSaleOfNotesReceivable us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem

us-gaap:GainLossOnSaleOfNotesReceivable

us-gaap:SubsequentEvent, stl:SmallBusinessAdministrationPaycheckProtectionProgram


Gain
Period End2020-10-29
Value3400000.0
Percentage of GainLossOnSaleOfNotesReceivable100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302016-12-312016-09-302015-12-312015-09-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.618-0.3090.00.00.00.00.011-0.0010.0010.00.00.00.00.00.00.00.00.00.093-0.070.0-0.010.0050.070.0050.00.00.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.00.00.00.00.00.0100.0100.0100.00.00.00.00.00.00.00.00.00.0100.0100.00.0100.0100.0100.0100.00.00.00.0

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnSalesOfLoansNet


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3.7390.02.8810.00.00.0-0.0248.3370.0160.0030.020.0020.0020.1210.130.7011.3631.1533.0732.0022.7622.9562.533.1572.8582.161.9272.3831.6160.2970.4290.5070.7460.4290.5780.450.440.1660.0090.310.5420.4220.045
Percentage of GainLossOnSalesOfLoansNet100.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnTerminationOfLease

us-gaap:GainLossOnTerminationOfLease


Gain
Period End2021-06-302021-03-312019-12-312019-09-30
Value0-127000.00278000.0
Percentage of GainLossOnTerminationOfLease0.0100.00.0100.0

us-gaap:GainsLossesOnSalesOfOtherRealEstate

us-gaap:GainsLossesOnSalesOfOtherRealEstate


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value217000.02000.0-150000.0145000.0-1081000.062000.0325000.076000.0-124000.0316000.0205000.0-124000.0648000.0272000.0-68000.0-439000.085000.0-1293000.0-14000.033000.0-160000.0-153000.0113000.0420000.046000.0487000.083000.067000.01317000.0185000.0-332000.0-1466000.0147000.0189000.0-155000.0-267000.0-249000.0-122000.0-56000.0-440000.0-329000.0
Percentage of GainsLossesOnSalesOfOtherRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss

us-gaap:HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss


Held
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value000-17000.000000-53000.0-21000.00000000022000.0037000.0000
Percentage of HeldToMaturitySecuritiesSoldSecurityRealizedGainLoss0.00.00.0100.00.00.00.00.00.0100.0100.00.00.00.00.00.00.00.00.0100.00.0100.00.00.00.0

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse

us-gaap:ImpairmentOfLongLivedAssetsHeldForUse


Impairment
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-30
Value0.00.1970.00.2786.7690.0
Percentage of ImpairmentOfLongLivedAssetsHeldForUse0.0100.00.0100.0100.00.0

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate

us-gaap:IncomeTaxReconciliationChangeInEnactedTaxRate


Income
Period End2020-09-302020-06-302020-03-312019-06-302019-03-312017-12-31
Value-4.8373.8628.2480.00.040
Percentage of IncomeTaxReconciliationChangeInEnactedTaxRate100.0100.0100.00.00.0100.0

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value25251920121.2822832252730303026-1.735232119211919121712-3.9658.78.8847.9777.3755.224-7.335
Percentage of IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

us-gaap:IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value421000.0640000.025000.0192000.0287000.0491000.0-362000.000-106000.0-239000.00-62000.0-379000.0-721000.0-1000.0-64000.0-742000.00000
Percentage of IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationOtherAdjustments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-166000.0-538000.05526000.01623000.0-606000.0506000.0-1075000.0-1034000.0-774000.0914000.02750000.0-5226000.0-147000.02859000.0-2700000.01386000.0-191000.048000.01817000.0-289000.0-1676000.0-20000.0-1112000.0-1136000.01627000.0-348000.0346000.0268000.0-1207000.0806000.01334000.0
Percentage of IncomeTaxReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value7.0386.164.2364.9421.0910.5896.6959.4696.1886.696.7657.337.8956.0590.5162.5312.4972.2740.5492.9382.9921.9932.5661.888-0.220.8750.683-0.3551.662-0.21-0.632
Percentage of IncomeTaxReconciliationStateAndLocalIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncomeTaxReconciliationTaxExemptIncome


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value5.85.7770.3937.8117.4937.4094.2535.4295.3035.2535.0864.974.8384.6276.4615.2133.793.4843.363.9421.9581.8341.8731.1711.190.9841.0291.1150.9840.9870.768
Percentage of IncomeTaxReconciliationTaxExemptIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes

us-gaap:IncreaseDecreaseInDeferredIncomeTaxes


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-4.0510-19.21511-4.31460-54.973-4.569-0.561-21.073-11.314-19.331-10.931-15.327-83.3161.519-0.4760.891.142.7363.228-6.214-1.190.2843.083-2.516120.0-0.720.819-1.857-5.564-1.072-0.1246.824-4.2272.884-4.8446.069-5.926
Percentage of IncreaseDecreaseInDeferredIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInTimeDeposits

us-gaap:IncreaseDecreaseInTimeDeposits


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-323.967-238.602-392.785-243.734-324.917-487.7875343344857-92.691-0.026966135-35.99455-37.192-72.2568-76.6395958-35.814-35.0483342-119.63423-116.376-49.544-85.9556.707-17.33-22.776-5.166-19.05-36.9457.375-85.03739-58.81729-50.155
Percentage of IncreaseDecreaseInTimeDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InformationTechnologyAndDataProcessing


Information
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value9.7419.2469.5598.4227.3128.0189.3138.5459.0478.6758.762109.99711112.5122.4212.4692.4492.4022.2611.7542.4422.6671.5682.1481.4241.0651.1170.6630.5950.460.5880.8230.6490.7150.7050.710.6720.7180.7120.6910.6420.5870.571
Percentage of InformationTechnologyAndDataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value230233242244253273295295302309313309304281276145134126123118114106106103716668676561523332323330282828272727292930
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseBorrowings

us-gaap:InterestExpenseBorrowings


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5.0857.0657.1678.583111517232227282930222012107.7026.5755.835.6016.0875.0754.6455.0144.7145.0325.0554.9914.9035.0014.7443.1252.9773.1253.0853.0013.2893.6173.6423.6373.7074.2344.3284.361
Percentage of InterestExpenseBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.6988.8681318284549484845413528242213109.5089.2519.2018.3286.4095.7295.2993.3593.0912.8182.4212.3192.3941.8341.0511.1511.6242.0971.7891.2621.2171.3131.3841.4931.5851.6421.6771.849
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value213207194187156732172092202252322342332212221151081041019795898988605657545249422524252421212121141920212121
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1111111212121313141415151515138.5427.7917.6187.1686.7515.8713.8793.143.1692.92.8672.8652.8662.7512.6742.1611.2351.51.491.4571.5431.5811.5991.7741.7861.8291.9011.9251.9412.037
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1515151818202021242730292927241513129.9929.87101212118.4237.6327.4137.5878.0057.5736.9034.7484.1894.2884.2843.9094.2244.4153.993.8253.6073.5313.534.0164.716
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions

us-gaap:InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value2018000.01852000.01700000.01735000.01379000.01847000.01597000.01758000.02050000.01900000.01901000.01943000.02121000.01825000.02103000.0271000.0323000.0
Percentage of InvestmentBankingAdvisoryBrokerageAndUnderwritingFeesAndCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value565856555454525254555454565454323131323231302929222322222325231211111212101110101111111111
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue

us-gaap:LifeInsuranceCorporateOrBankOwnedChangeInValue


Life
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value4.9814.9554.9615.3644.9495.0184.778.0674.1923.6414.063.7344.2433.6143.3741.421.6521.371.3331.8911.2811.3271.7921.2931.0741.0761.0240.7971.1170.5420.7420.6030.4960.390.5090.511
Percentage of LifeInsuranceCorporateOrBankOwnedChangeInValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetChangeInterestAndNoninterestBearingDepositsDomestic

us-gaap:NetChangeInterestAndNoninterestBearingDepositsDomestic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-370.818961-742.6828981367628305296-324.458-44.755-147.8949127419317576195220-56.744342533689-283.585.064154310-129.302315-132.963407-289.376309-67.151-87.396-183.991
Percentage of NetChangeInterestAndNoninterestBearingDepositsDomestic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value120118133119124114115106126114109111124111250625960576259685771854545434446722321232228212120242221212120
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value3032332826473251271922243718231313121619201516181314131213129.1486.66.5816.8527.6599.0267.9797.9717.1769.0565.2175.7959.8837.7145.281
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOther

us-gaap:NoninterestIncomeOther


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.9462.3641.6781.8421.5093.9854.5914.1113.1443.4544.3442.4553.2442.92-5.7544.2244.3573.8836.2963.1713.1462.272.141.7721.1660.7591.361.1921.341.2970.7290.0970.4830.4741.530.8290.6240.3890.4550.5430.6630.480.5380.4630.495
Percentage of NoninterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1314141414151515161616161717188.5838.8338.1348.3738.0218.819.2829.3059.5767.4536.587.2457.1486.9927.2546.3333.7663.4233.9543.813.9593.3883.4093.7013.6933.4233.7573.6353.4033.168
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value10-24.549-3.225-0.9382135-5.30821465438-19.613-21.168-53.83-12.1542.5387.0612.747-34.736-1.2788.98416-11.1198.3941.003
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OciBeforeReclassificationsNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Oci
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value10-24.549-3.225-0.9382135-5.30821465438-19.613-21.168-53.83-12.1542.5387.0612.747-34.736-1.2788.98416-11.5548.3943.943
Percentage of OciBeforeReclassificationsNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0103.9100.0393.1

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.7033.92815105.1094.5584.7134.153
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-4.214-1.0282937-6.7986.616648272-26.387-28.381-65.987-20.6734.478124.817-57.071-5.0211126-19.65221-14.7169.5862.103-6.411119.009-7.475
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-4.346-1.9382892-7.262264-27.05555-27.028
Percentage of OtherComprehensiveIncomeLossBeforeTax103.1188.599.5245.4106.8335.699.7-33.076.7102.4

us-gaap:HeldtomaturitySecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.1080.1310.059-0.6460.1170.1190.121-1.1010.2230.225
Percentage of OtherComprehensiveIncomeLossBeforeTax-2.6-12.70.2-1.7-1.71.80.2-1.30.3-0.9

us-gaap:OtherComprehensiveIncomeLossBeforeTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0240.7790.0761.1610.347-15.7060.30418160.4150.058-1.246-0.785
Percentage of OtherComprehensiveIncomeLossBeforeTax-0.6-75.80.33.1-5.1-237.40.522.923.0-1.6-0.21.93.8

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value15-37.6252937
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value11-27.225-3.05-0.7442027-4.9184.788465952-19.094-20.537-47.749-12.5072.7097.3532.914-34.528-3.0376.77116-11.299121.208
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

stl:AOCIAccumulatedGainLossDebtSecuritiesTransferredToHeldToMaturityParent


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.0290.0330.0430.07
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.3-0.10.20.3

stl:NetUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldtomaturity


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value0.0780.0950.0430.070.0850.0860.0881.7490.1610.1630.1640.1690.1470.1440.1480.1470.1390.3280.469-0.0450.1680.170.177
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent-2.6-12.80.20.3-1.71.80.22.90.3-0.9-0.8-0.4-1.25.32.05.0-0.4-10.86.9-0.3-1.51.414.7

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value0.365-2.1890.0170.5640.055-1.8580.251-11.3650.0482.086120.30.0420.491-0.4750.0060.0050.0340.007-0.0110.0260.2140.0175.38-2.937
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent3.28.0-0.6-75.80.3-6.8-5.1-237.40.13.523.2-1.6-0.2-1.03.80.20.11.2-0.00.40.41.3-0.243.5-243.1

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value10-25.069-3.145-1.4032029-5.25416465540-19.557-20.743-48.409-12.1792.5597.22.733-34.674-3.3546.27616-11.4846.8273.968
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent96.592.1103.1188.699.5106.5106.8335.699.793.576.5102.4101.0101.497.494.597.993.8100.4110.492.799.0101.655.2328.5

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value11-27.2252027
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-0.0130.719-0.1110.6420.4858.412-0.0756.882-0.528-13.184-4.886-0.056-0.425-5.421-0.07-0.021-0.23-0.023-0.1023.4334.474-0.283-0.1212.7260.6971.534-0.0430.033-1.1930.06-0.64512-1.945
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-0.5043.025-0.024-0.779-0.0762.568-0.34715-0.066-2.883-16.674-0.415-0.058-0.6790.785-0.01-0.008-0.056-0.0110.018-0.043-0.354-0.029-9.357-0.169-0.2035.1080.8170.0261.301-2.336-3.403
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeLossTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value-1.164-0.2848.01710-1.881.828172219-7.293-7.844-18.238-8.1661.7694.8011.903-22.543-1.9844.42210-8.3539.148-6.2544.0740.895-2.7244.8143.829-3.34
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.201-0.5357.9825-2.0066.13717-7.47815-7.471
Percentage of OtherComprehensiveIncomeLossTax103.2188.499.5245.4106.7335.799.7-33.077.4102.4

us-gaap:HeldtomaturitySecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.030.0360.016-0.1780.0320.0330.033-0.3040.0620.062
Percentage of OtherComprehensiveIncomeLossTax-2.6-12.70.2-1.7-1.71.80.2-1.30.3-0.9

us-gaap:OtherComprehensiveIncomeLossTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0070.2150.0210.3210.096-4.3410.2565.0194.4360.1150.016-0.345-0.31
Percentage of OtherComprehensiveIncomeLossTax-0.6-75.70.33.1-5.1-237.51.422.122.3-1.6-0.21.93.8

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value4.318-10.48.01710
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value15-33.926-4.457-1.2962948-7.33729647550-27.083-29.091-72.321-20.2014.209114.495-57.414-2.1121426-20.09414-14.473106.858-5.8381210-0.6150.00.00.00.041-0.4550.00.00.498
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.00.0100.0

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherInterestAndDividendIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1.1580.9020.570.7691.6364.4625.6995.3275.1196.4017.5626.8056.2194.3584.0052.1111.5191.531.2631.0371.1181.0771.1771.2410.880.9020.940.8630.8160.7660.3590.1970.2660.2640.3330.2650.2280.2440.2550.2120.2370.3320.40.270.262
Percentage of OtherInterestAndDividendIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1515-0.914203323191620161613131327101010101211131112369.822119.172108.0747.4557.0683.593.1743.5442.3141.9491.8251.6942.4381.8891.9271.9811.8782.053
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value-8.905418.2443-68.37-91.04-76.918-14.042-20.914-27.324-34.843-29.141-31.427-19.063-88.575.6565.981-28.39834-53.35591-50.113-9.7814.935-49.399-8.926-5.405-0.161216.7057.621-4.380.8226.664-29.519-16.7289.581-0.99610-7.9426.849-18.3819.689
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value110.389360.03.50.00.04.50.01.4597.383441.0650.00.05.15962144138102114173174137138941191141131224232427172015110.07.7913025
Percentage of PaymentsForOriginationAndPurchasesOfLoansHeldForSale100.0100.0100.00.0100.00.00.0100.00.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromDepositOnLoan

us-gaap:PaymentsForProceedsFromDepositOnLoan


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312013-12-31
Value15-22.55924-14.34526-38.17526-11.41928-29.145243331-39.08336-2.717-3.2780.4192.264-1.5530.689-1.1940.327-0.814
Percentage of PaymentsForProceedsFromDepositOnLoan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromFederalHomeLoanBankStock

us-gaap:PaymentsForProceedsFromFederalHomeLoanBankStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2.525-12.222-1.103-26.373-47.056-11.083-25.124-43.63122-71.23518-28.949257092311212274.815-15.4751.5722715-0.461-6.5739.352-7.9934610-2.417-4.0568.1171.005-0.003-0.0031.078-4.664.205-1.2230.628-5.0963.703-5.024
Percentage of PaymentsForProceedsFromFederalHomeLoanBankStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-31
Value2193000.02194000.02194000.02194000.02193000.02194000.02193000.02194000.02194000.02194000.02194000.02194000.02193000.02194000.02194000.00
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-06-302020-03-31
Value-26000.06635000.0191000.04413000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value270419799.01611241607.0411711930306416567543
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PaymentsToAcquireHeldToMaturitySecurities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.1270.6526.2872.0990.4730.882126.1820.6123.424.709404654937507101003651420242678016284.34717544654852.0845921116.4940.2487687-1.334.0193.9864.709
Percentage of PaymentsToAcquireHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockDividendsAndOtherAdjustments

us-gaap:PreferredStockDividendsAndOtherAdjustments


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1959000.01963000.01966000.01969000.01972000.01976000.01976000.01982000.01987000.01989000.01990000.01993000.01996000.01999000.02002000.00000000
Percentage of PreferredStockDividendsAndOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

us-gaap:ProceedsFromCollectionOfFinanceReceivables

us-gaap:ProceedsFromCollectionOfFinanceReceivables


Proceeds
Period End2020-09-302020-06-302020-03-312019-06-302019-03-31
Value8.5843.233950.00.0
Percentage of ProceedsFromCollectionOfFinanceReceivables100.0100.0100.00.00.0

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings

us-gaap:ProceedsFromFederalHomeLoanBankBorrowings


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.07275300150875102530010500.0185011252003550
Percentage of ProceedsFromFederalHomeLoanBankBorrowings0.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromLifeInsurancePolicies

us-gaap:ProceedsFromLifeInsurancePolicies


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302015-12-312015-09-302014-12-312013-12-31
Value0.04.1010.6211.0360.6892.2180.642612.3250.132101.0921.884-0.0263.5350.050.00.0011.2452.4550.00.0
Percentage of ProceedsFromLifeInsurancePolicies0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value172.95-18.974340.01391171681077173871077611257367061112674450331141235244254224166761378525276653508196
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromRepaymentsOfOtherDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312013-12-31
Value-5.877-272.4222688.775-1.1144.884-3.8665.643-6.1195.682-1.553.774-7.736-3.312-158.241657827-4.549-7.0114.6317.005-35.7930.0
Percentage of ProceedsFromRepaymentsOfOtherDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value0.0200.0245240713866470.0738690.00.011725015.01510.0
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt0.0100.00.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities

us-gaap:ProceedsFromSaleOfHeldToMaturitySecurities


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value0.0930.01390.00.00.00.00.00.00.2540.00.00.00.00.00.00.00.0-0.0470.01.2340.00.00.0
Percentage of ProceedsFromSaleOfHeldToMaturitySecurities0.0100.00.0100.00.00.00.00.00.00.0100.00.00.00.00.00.00.00.00.0100.00.0100.00.00.00.0

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ProceedsFromSaleOfLoansHeldForInvestment

us-gaap:ResidentialPortfolioSegment, us-gaap:ResidentialMortgage


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value360.00.00.00.0901319
Percentage of ProceedsFromSaleOfLoansHeldForInvestment100.00.00.00.00.0100.0100.0

us-gaap:ProceedsFromSaleOfLoansHeldForSale

us-gaap:ProceedsFromSaleOfLoansHeldForSale


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value81363.501-0.0010.0010.002223.8182.2735.8571.046214.885-3.6820.1212.6894510312011111114913922311111212112011912212242827251421177.9780.009113322
Percentage of ProceedsFromSaleOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfOtherRealEstate

us-gaap:ProceedsFromSaleOfOtherRealEstate


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value4.6280.1221.4222.1422.0691.1683.3232.1544.3974.1987.1562.346.8567.593.6990.8131.0083.3612.7891.7651.2750.3760.5261.9110.1320.9971.8250.5515.6162.880.6271.4421.2031.3740.7111.7230.2960.7540.6950.301
Percentage of ProceedsFromSaleOfOtherRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302015-12-312014-12-312013-12-31
Value0.6183.2793.2537.3230.0261.88411134.8350.0230.00.00.00.00.00.627
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1829000.0752000.0095000.0101000.0414000.0512000.0508000.02268000.055000.0135000.0154000.073000.0329000.01385000.065000.0731000.0493000.0144000.02278000.0755000.0546000.0-832000.0851000.0-13000.02758000.0574000.0110000.0513000.0923000.01448000.0-128000.042000.06000.0142000.0-51000.00-1000.0154000.0001000.03000.0151000.0
Percentage of ProceedsFromStockOptionsExercised100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.00.0100.0100.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value7.5617.0777.3436.3435.4585.7494.5534.4386.384.1484.1022.8662.9013.5023.0652.2342.4782.2052.5922.6042.6072.4712.1352.1592.0961.9151.3141.9131.6831.51.8180.740.5260.9121.2151.1361.1281.0560.9271.1471.1371.0431.0621.2081.063
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value27305613810131110109.51313125.04.54.55.55.55.04.05.55.03.12.13.05.355.954.83.02.73.92.62.953.52.3122.851.958.7843.62.12.12.252.75
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312020-01-012019-12-312019-09-302019-06-302019-03-31
Value6.010.027315613625110131110
Percentage of ProvisionForLoanLossesExpensed100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanLossesExpensed us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

stl:AcquisitionDevelopmentAndConstruction


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-2.4320.8760.389-0.352.992101.90.360.143
Percentage of ProvisionForLoanLossesExpensed-40.58.81.4-1.15.37.713.93.11.4

stl:AssetBasedLending


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-2.689-1.597-13.192-3.6025.8631.23116.8830.594
Percentage of ProvisionForLoanLossesExpensed-44.8-16.0-48.0-11.610.40.985.059.95.8

stl:CommercialAndIndustrial


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1.6614.28220-4.4291313-3.1960.0228.435
Percentage of ProvisionForLoanLossesExpensed27.742.874.8-14.323.110.1-23.30.282.7

stl:EquipmentFinancingReceivables


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2.247-2.215-0.523-1.31525134.1141.2142.994
Percentage of ProvisionForLoanLossesExpensed37.5-22.1-1.9-4.245.310.230.010.629.4

stl:FactoredReceivables


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.497-0.069-0.2631.2665.1227.748-0.130.088-0.061
Percentage of ProvisionForLoanLossesExpensed8.3-0.7-1.04.19.05.7-0.90.8-0.6

stl:Multifamilyfinancing


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.6453.286-5.9583.056-12.292220.1060.6950.201
Percentage of ProvisionForLoanLossesExpensed60.832.9-21.79.9-21.716.70.86.02.0

stl:PayrollFinance


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.13-0.440.2140.242-1.240.3230.538-0.628-0.639
Percentage of ProvisionForLoanLossesExpensed2.2-4.40.80.8-2.20.23.9-5.5-6.3

stl:PublicSectorFinance


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1.5360.1160.3320.4191.8360.728-0.0550.46-0.605
Percentage of ProvisionForLoanLossesExpensed25.61.21.21.43.20.5-0.44.0-5.9

stl:WarehouseLending


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-0.145-0.4920.2180.8380.379-0.266-0.2960.15-2.107
Percentage of ProvisionForLoanLossesExpensed-2.4-4.90.82.70.7-0.2-2.21.3-20.7

us-gaap:CommercialRealEstatePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.4456.55534290.74662-2.8691.3480.81
Percentage of ProvisionForLoanLossesExpensed57.465.5124.293.61.346.0-20.911.77.9

us-gaap:ConsumerLoan


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-0.1940.027-2.133-0.3682.9160.486-0.1730.036-0.12
Percentage of ProvisionForLoanLossesExpensed-3.20.3-7.8-1.25.20.4-1.30.3-1.2

us-gaap:ResidentialMortgage


Provision
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-1.701-0.3296.235112.462.1210.8720.555
Percentage of ProvisionForLoanLossesExpensed-28.4-3.320.120.41.815.57.65.4

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-0.3942.676-0.175-0.1940.2537.875-0.3916-0.518-13.375-14.302-0.519-0.631-6.0810.353-0.171-0.292-0.167-0.2081.7592.2130.0020.18-3.983-0.205
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

stl:AOCIAccumulatedGainLossDebtSecuritiesTransferredToHeldToMaturityParent


Reclassification
Period End2021-06-302021-03-312020-06-302020-03-31
Value-0.029-0.033-0.043-0.07
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent7.4-1.2-17.0-0.9

stl:NetUnrealizedHoldingGainLossOnSecuritiesTransferredToHeldtomaturity


Reclassification
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-0.078-0.095-0.043-0.07-0.085-0.086-0.088-1.749-0.161-0.163-0.164-0.169-0.147-0.144-0.148-0.147-0.139-0.328-0.4690.045-0.168-0.17-0.177
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent44.649.0-17.0-0.921.8-0.517.013.11.131.426.02.8-41.684.250.788.066.8-18.6-21.22250.0-93.34.386.3

us-gaap:AccumulatedDefinedBenefitPlansAdjustment


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-0.3652.189-0.017-0.564-0.0551.858-0.25111-0.048-2.086-12.237-0.3-0.042-0.4910.475-0.006-0.005-0.034-0.0070.011-0.026-0.2140.418-5.38-0.003
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent92.681.89.7290.7-21.723.664.469.99.315.685.657.86.78.1134.63.51.720.43.40.6-1.2-10700.0232.2135.11.5

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Reclassification
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value-0.0090.52-0.080.4650.3516.087-0.0544.98-0.382-9.54-1.904-0.056-0.425-5.4210.025-0.021-0.1390.014-0.0622.0762.7080.171-0.071.567-0.025
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent2.319.445.7-239.7138.777.313.830.673.771.313.310.867.489.17.112.347.6-8.429.8118.0122.48550.0-38.9-39.312.2

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings

us-gaap:RepaymentsOfFederalHomeLoanBankBorrowings


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value39765090055090010001125112593511251075300170947535012515717017749520252057510160300.21966
Percentage of RepaymentsOfFederalHomeLoanBankBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2020-12-31
Value117
Percentage of RepaymentsOfLinesOfCredit100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312014-12-312013-12-312013-09-302013-06-302012-09-302012-06-302011-09-30
Value0.00.01712.00.00.00.06.95419770.00.00.00.00.00.00.00.00.0-0.0010.0
Percentage of RepaymentsOfSeniorDebt0.00.0100.0100.00.00.00.0100.0100.0100.00.00.00.00.00.00.00.00.00.0100.00.0

us-gaap:RepaymentsOfSubordinatedDebt us-gaap:ConsolidatedEntities, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfSubordinatedDebt

srt:Subsidiaries, us-gaap:SubordinatedDebt


Repayments
Period End2020-12-31
Value30
Percentage of RepaymentsOfSubordinatedDebt100.0

us-gaap:RestrictedStockExpense

us-gaap:RestrictedStockExpense


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value6.7816.6175.2225.8695.9136.0065.184.5654.6055.1233.6793.1133.3342.8522.5051.9211.8491.6861.4991.5791.6221.4141.0910.8830.8690.8280.830.7550.772
Percentage of RestrictedStockExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2.8460.00.0-1.759-11.4090.0125
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.00.00.0100.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

stl:NonvestedStockAwardsandPerformanceUnits, stl:RecognitionAndRetentionPlan


Share
Period End2021-06-302021-03-312020-12-312014-12-31
Value-0.0319.05-0.0813.23
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

stl:NonvestedStockAwardsandPerformanceUnits, stl:RecognitionAndRetentionPlan


Share
Period End2021-06-302021-03-312020-12-312015-06-302015-03-312014-12-31
Value020.36-1.830.3613.2112.96
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

stl:NonvestedStockAwardsandPerformanceUnits, stl:RecognitionAndRetentionPlan


Share
Period End2021-06-302021-03-312020-12-312014-12-31
Value021.31-0.0110.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2020-12-312014-12-31
Value012.31
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice0.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice us-gaap:AwardType

us-gaap:EmployeeStockOption


Share
Period End2021-06-302021-03-31
Value0.5710.17
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice0.00.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value5.5795.7221.5934.3044.4041.1052.7893.1330.011.8861.881.740.3920.6711.5191.5081.225-0.6560.8340.8721.132-0.1040.541
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value5.7425.966-17.2084.925.291-24.6263.6573.223-14.631.354-1.5951.957-7.0431.5011.6491.485-5.397-2.2310.6370.5540.006-2.4030.58
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures102.9104.3-1080.2114.3120.1-2228.6131.1102.9-146300.071.8-84.8112.5-1796.7223.7108.698.5-440.6340.176.463.50.52310.6107.2

us-gaap:RetainedEarnings


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.0160.005140.0780.0120.00.1688.0780.5981.6670.2933.8460.1830.0090.0041.381-0.3380.0760.130.1320.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures0.30.1927.61.80.01168.60.05.480780.031.788.716.8981.127.30.60.3112.751.59.114.911.7-0.0

us-gaap:TreasuryStock


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-0.179-0.2494.025-0.694-0.88712-0.868-0.2586.562-0.0661.808-0.513.589-1.013-0.1390.0195.2411.9130.1210.1880.9942.299-0.039
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures-3.2-4.4252.7-16.1-20.11160.0-31.1-8.265620.0-3.596.2-29.3915.6-151.0-9.21.3427.8-291.614.521.687.8-2210.6-7.2

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-312020-06-302020-03-312013-06-30
Value6781000.06617000.05913000.06006000.0240000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-06-302020-03-312013-06-30
Value7108000.07138000.06146000.07308000.0240000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation104.8107.9103.9121.7100.0

us-gaap:RetainedEarnings


Stock
Period End2021-06-302021-03-312020-03-312013-06-30
Value-2000.0-106000.0589000.00
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-0.0-1.69.80.0

us-gaap:TreasuryStock


Stock
Period End2021-06-302021-03-312020-06-302020-03-312013-06-30
Value-325000.0-415000.0-233000.0-1891000.00
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation-4.8-6.3-3.9-31.50.0

us-gaap:TransferOfLoansHeldForSaleToPortfolioLoans1

us-gaap:TransferOfLoansHeldForSaleToPortfolioLoans1


Transfer
Period End2020-12-312020-09-302019-12-312019-09-302018-06-30
Value0.04.5-0.050.05128
Percentage of TransferOfLoansHeldForSaleToPortfolioLoans10.0100.0100.0100.0100.0

us-gaap:TransferToOtherRealEstate

us-gaap:TransferToOtherRealEstate


Transfer
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0.00.2510.00.7322.1811.4561.6471.0073.5934.9351.9794.7163.062.7511.4890.6670.00.843.4980.4423.1963.5251.432.8740.0291.0690.3810.2190.873
Percentage of TransferToOtherRealEstate0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStockValueAcquiredCostMethod


Treasury
Period End2021-03-312020-03-312019-09-302019-06-302019-03-312012-12-312011-09-30
Value278153921540.0211.214
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStock


Treasury
Period End2021-03-312020-03-312019-09-302019-06-302019-03-312012-12-312011-09-30
Value278153921540.0211.214
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

us-gaap:UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities


Unrecognized
Period End2020-12-312020-09-30
Value01315000.0
Percentage of UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities0.0100.0

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions

us-gaap:UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions


Unrecognized
Period End2020-12-312020-09-302020-06-302020-03-312019-06-30
Value0.00.00.0110.0
Percentage of UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions0.00.00.0100.00.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-06-302013-03-312012-12-312012-06-302012-03-312011-12-312011-06-30
Value856100.0731400.0221010.0124670.0364980.0476220.0444120.0348750.0534380.0537620.0533460.0603370.0605030.0648370.0636420.0607260.0526950.0459030.0384800.0413740.0363540.0226080.0296340.00104290.0104850.083776.027774.036127.001822.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0100.0

stl:AccruedInterestPayableBorrowingsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

stl:AccruedInterestPayableBorrowingsFairValueDisclosure

us-gaap:FairValueInputsLevel2


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1.484103.4257.9193.686128.629141414111415149.6499.9497.1067.5273.6216.6335.1492.3764.492.8614.2542.9044.3541.0964.2732.7361.481.525
Percentage of AccruedInterestPayableBorrowingsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestPayableBorrowingsFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1.484103.4257.9193.686128.629141414111415149.6499.9497.1067.5273.6216.6335.1492.3764.492.8614.2542.9044.3541.0964.2732.7361.481.525
Percentage of AccruedInterestPayableBorrowingsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestPayableDepositsIncludingEscrowFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

stl:AccruedInterestPayableDepositsIncludingEscrowFairValueDisclosure

us-gaap:FairValueInputsLevel2


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value529000.0597000.01068000.01428000.02232000.04144000.05427000.05417000.04222000.04222000.03191000.01905000.01208000.01139000.01103000.0812000.0691000.0598000.0663000.0622000.0595000.0495000.0483000.0414000.0428000.0208000.0329000.02942000.0398000.0427000.03205000.01480000.0
Percentage of AccruedInterestPayableDepositsIncludingEscrowFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestPayableDepositsIncludingEscrowFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value529000.0597000.01068000.01428000.02232000.04144000.05427000.05417000.04222000.04222000.03191000.01905000.01208000.01139000.01103000.0812000.0691000.0598000.0663000.0622000.0595000.0495000.0483000.0414000.0428000.0208000.0329000.02942000.0398000.0427000.03205000.01480000.0
Percentage of AccruedInterestPayableDepositsIncludingEscrowFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestReceivablesLoansFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

stl:AccruedInterestReceivablesLoansFairValueDisclosure

us-gaap:FairValueInputsLevel3


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value687070707268717171766865635959312928262521212018181111109.5799.3448.7856.805
Percentage of AccruedInterestReceivablesLoansFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestReceivablesLoansFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value687070707268717171766865635959312928262521212018181111109.5799.3448.7856.805
Percentage of AccruedInterestReceivablesLoansFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestReceivablesSecuritiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

stl:AccruedInterestReceivablesSecuritiesFairValueDisclosure

us-gaap:FairValueInputsLevel2


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value283226312832293334393843394234261820161713111112109.727.7428.8766.998.817.2714.892
Percentage of AccruedInterestReceivablesSecuritiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccruedInterestReceivablesSecuritiesFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value283226312832293334393843394234261820161713111112109.727.7428.8766.998.817.2714.892
Percentage of AccruedInterestReceivablesSecuritiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax us-gaap:RetirementPlanType

stl:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value77000.0575000.0413000.0-66000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-31
Value487000.0455000.03809000.0-400000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPlanTax632.579.1922.3606.1

stl:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAccumulatedAmortization

stl:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAccumulatedAmortization


Amortization
Period End2020-12-312019-12-312018-12-312017-12-31
Value86533629
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAccumulatedAmortization100.0100.0100.0100.0

stl:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsGross

stl:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsGross


Amortization
Period End2020-12-312019-12-312018-12-312017-12-31
Value574439217132
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsGross100.0100.0100.0100.0

stl:BankOwnedLifeInsuranceIncludingClaimsStabilizationReserves

stl:BankOwnedLifeInsuranceIncludingClaimsStabilizationReserves


Bank
Period End2020-12-312019-12-31
Value409397
Percentage of BankOwnedLifeInsuranceIncludingClaimsStabilizationReserves100.0100.0

stl:CapitalRequiredForCapitalAdequacyFullyPhasedIn us-gaap:ConsolidatedEntities

stl:CapitalRequiredForCapitalAdequacyFullyPhasedIn

srt:ParentCompany


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value24342449251325242502247424582324231022262260219322142087
Percentage of CapitalRequiredForCapitalAdequacyFullyPhasedIn100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value24302445251025212499247124552322230822242258219222122085
Percentage of CapitalRequiredForCapitalAdequacyFullyPhasedIn99.899.999.999.999.999.999.999.999.999.999.999.999.999.9

stl:CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn us-gaap:ConsolidatedEntities

stl:CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn

srt:ParentCompany


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10.510.510.510.50.1050.1050.1050.1050.1050.1050.1050.1050.1050.105
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10.510.510.510.50.1050.1050.1050.1050.1050.1050.1050.1050.1050.105
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsFullyPhasedIn100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:CashOnDepositAsSwapCollateralAndSettlement

stl:CashOnDepositAsSwapCollateralAndSettlement


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value6269829195946718
Percentage of CashOnDepositAsSwapCollateralAndSettlement100.0100.0100.0100.0100.0100.0100.0100.0

stl:CertificatesOfDeposit

stl:CertificatesOfDeposit


Certificates
Period End2020-12-312019-12-312018-12-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1996344824762439602546583656587664605547582502480437557533650268
Percentage of CertificatesOfDeposit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:CertificatesOfDepositFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

stl:CertificatesOfDepositFairValueDisclosure

us-gaap:FairValueInputsLevel2


Certificates
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value143217582002239926462973344429102572251324472532253424682412564600544582656588664603546582502480438557533650268
Percentage of CertificatesOfDepositFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:CertificatesOfDepositFairValueDisclosure us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Certificates
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value143317571996238926342959344829142580253324762570257225042439566602546583656587664605547582502480437557533650268
Percentage of CertificatesOfDepositFairValueDisclosure100.1100.099.799.699.599.5100.1100.1100.3100.8101.2101.5101.5101.5101.1100.3100.3100.3100.2100.099.8100.0100.3100.0100.099.9100.0100.0100.0100.0100.0100.0

stl:DeferredLoanFeeandCost

stl:DeferredLoanFeeandCost


Deferred
Period End2020-12-312019-12-312018-12-31
Value3532000.02694000.00
Percentage of DeferredLoanFeeandCost100.0100.00.0

stl:DeferredTaxAssetsOperatingLeaseLiability

stl:DeferredTaxAssetsOperatingLeaseLiability


Deferred
Period End2020-12-312019-12-31
Value3032
Percentage of DeferredTaxAssetsOperatingLeaseLiability100.0100.0

stl:DeferredTaxAssetsPurchaseAccountingAdjustments

stl:DeferredTaxAssetsPurchaseAccountingAdjustments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-09-30
Value108.95310229.928.2294.9525.4181.497
Percentage of DeferredTaxAssetsPurchaseAccountingAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0

stl:DeferredTaxLiabilitiesAcquisitions

stl:DeferredTaxLiabilitiesAcquisitions


Deferred
Period End2020-12-312019-12-312018-12-312014-12-312014-09-302013-09-30
Value4428000.01633000.0000112000.0
Percentage of DeferredTaxLiabilitiesAcquisitions100.0100.00.00.00.0100.0

stl:DeferredTaxLiabilitiesPurchaseAccountingFairValueAdjustments

stl:DeferredTaxLiabilitiesPurchaseAccountingFairValueAdjustments


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-09-30
Value5856230.0181515161.057
Percentage of DeferredTaxLiabilitiesPurchaseAccountingFairValueAdjustments100.0100.0100.00.0100.0100.0100.0100.0100.0

stl:DeferredTaxLiabilityLeasesRightOfUseAsset

stl:DeferredTaxLiabilityLeasesRightOfUseAsset


Deferred
Period End2020-12-312019-12-31
Value2830
Percentage of DeferredTaxLiabilityLeasesRightOfUseAsset100.0100.0

stl:Deferredtaxassetsdeferredrent

stl:Deferredtaxassetsdeferredrent


Deferredtaxassetsdeferredrent
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-09-30
Value805000.01496000.02992000.03445000.03268000.03849000.01967000.001059000.0
Percentage of Deferredtaxassetsdeferredrent100.0100.0100.0100.0100.0100.0100.00.0100.0

stl:Deferredtaxliabilityprepaidpensioncost

stl:Deferredtaxliabilityprepaidpensioncost


Deferredtaxliabilityprepaidpensioncost
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302013-09-30
Value0.5640.6244.2220.03.7984.49210103.758
Percentage of Deferredtaxliabilityprepaidpensioncost100.0100.0100.00.0100.0100.0100.0100.0100.0

stl:FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyCashasCollateral us-gaap:FinancialInstrument

stl:FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyCashasCollateral

us-gaap:LetterOfCredit


Fair
Period End2020-12-31
Value90
Percentage of FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyCashasCollateral100.0

stl:FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyOtherCollateral us-gaap:FinancialInstrument

stl:FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyOtherCollateral

us-gaap:LetterOfCredit


Fair
Period End2020-12-31
Value88
Percentage of FairValueDisclosureOffbalanceSheetRisksAssetAmountSecuredbyOtherCollateral100.0

stl:FinancingReceivableAllowanceForCreditLossAsAPercentOfFinancingReceivable us-gaap:UnusualOrInfrequentItem

stl:FinancingReceivableAllowanceForCreditLossAsAPercentOfFinancingReceivable

stl:ImpactOfCOVID19


Financing
Period End2021-03-312020-12-31
Value1.530.5
Percentage of FinancingReceivableAllowanceForCreditLossAsAPercentOfFinancingReceivable100.0100.0

stl:FinancingReceivableBeforeAllowanceForCreditLossCollateralDependentAssessmentThreshold

stl:FinancingReceivableBeforeAllowanceForCreditLossCollateralDependentAssessmentThreshold


Financing
Period End2020-12-31
Value750000.0
Percentage of FinancingReceivableBeforeAllowanceForCreditLossCollateralDependentAssessmentThreshold100.0

stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:UnusualOrInfrequentItem

stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:CommercialAndIndustrial, stl:ImpactOfCOVID19


Financing
Period End2020-09-302020-06-30
Value0.70.063
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding100.0100.0

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:EquipmentFinancingReceivables, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.10.20.24.90.139
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0700.0220.6

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, us-gaap:CommercialRealEstate, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.80.71.02.40.129
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0342.9204.8

stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:UnusualOrInfrequentItem

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, stl:ImpactOfCOVID19


Financing
Period End2020-09-302020-06-30
Value1.10.049
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding157.177.8

us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.50.40.81.60.088
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0228.6139.7

stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding us-gaap:FinancingReceivablePortfolioSegment, us-gaap:UnusualOrInfrequentItem

us-gaap:CommercialPortfolioSegment, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.30.20.41.40.07
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0200.0111.1

us-gaap:ConsumerPortfolioSegment, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value2.02.43.76.20.09
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0885.7142.9

us-gaap:ResidentialPortfolioSegment, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value3.75.37.210.10.151
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.01442.9239.7

stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:UnusualOrInfrequentItem

srt:Multifamily, us-gaap:RealEstateSector, us-gaap:CommercialPortfolioSegment, us-gaap:RealEstateLoan, stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.10.10.50.80.043
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0114.368.3

stl:FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding us-gaap:UnusualOrInfrequentItem

stl:ImpactOfCOVID19


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.50.61.02.10.077
Percentage of FinancingReceivableBeforeAllowanceForCreditLossPaymentDeferralPercentageOfLoanBalanceOutstanding0.00.00.0300.0122.2

stl:FinancingReceivableUnpaidBalanceOfLoansSold us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem

stl:FinancingReceivableUnpaidBalanceOfLoansSold

us-gaap:SubsequentEvent, stl:SmallBusinessAdministrationPaycheckProtectionProgram


Financing
Period End2020-10-29
Value266
Percentage of FinancingReceivableUnpaidBalanceOfLoansSold100.0

stl:HeldToMaturitySecuritiesAfterAllowanceForCreditLoss

stl:HeldToMaturitySecuritiesAfterAllowanceForCreditLoss


Held
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1695171617401781192419531979
Percentage of HeldToMaturitySecuritiesAfterAllowanceForCreditLoss100.0100.0100.0100.0100.0100.0100.0

stl:ImpairedLoansMeasurementInput us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType

stl:ImpairedLoansMeasurementInput

us-gaap:FairValueInputsLevel3, stl:AssetBasedLending, s