SI


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

Table of contents


us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic

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

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:StatementEquityComponents

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpense

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:Assets
us-gaap:ConsolidatedEntities

us-gaap:Liabilities
us-gaap:ConsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapital

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

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

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:LongTermDebt

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock
us-gaap:CommonStockValue
us-gaap:StatementClassOfStock

us-gaap:AdditionalPaidInCapital
us-gaap:ConsolidatedEntities

us-gaap:RetainedEarningsAccumulatedDeficit
us-gaap:ConsolidatedEntities

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:ConsolidatedEntities

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:DeferredTaxLiabilities

si:DepreciationAndAmortizationExcludingAmortizationOfSecuritiesAndLoansPremiumsAndDiscounts
us-gaap:DerivativeInstrumentRisk
si:DerivativeInstrumentUpfrontFeePaid

si:FeesAndCommissionsDeposits

si:FeesAndCommissionsOffBalanceSheetDeposits
us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName
si:FinancingReceivableModificationOtherThanTroubledDebtRestructuringPostmodification

si:FinancingReceivableRelatedPartiesAdditions

si:FinancingReceivableRelatedPartiesProceeds
us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
si:InterestIncomeSecuritiesOperating

si:OtherGainsLossesNet

si:PaymentsToAcquireFederalHomeLoanAndFederalReserveBankStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
si:ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

si:ProceedsFromLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:CommunicationsAndInformationTechnology
us-gaap:StatementGeographical, us-gaap:Collateral, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

us-gaap:DividendIncomeOperating

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes

us-gaap:EffectiveIncomeTaxRateReconciliationTaxCredits

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear

us-gaap:FeesAndCommissionsMortgageBankingAndServicing

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

us-gaap:ForeclosedRealEstateExpense

us-gaap:GainLossOnSaleOfInvestments

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod

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

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

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

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

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes

us-gaap:IncomeTaxReconciliationTaxCredits

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInLoansFromOtherFederalHomeLoanBanks

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm

us-gaap:InterestExpenseMediumTermNotes

us-gaap:InterestExpenseSubordinatedNotesAndDebentures
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:InterestIncomeDepositsWithFinancialInstitutions
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:LaborAndRelatedExpense

us-gaap:LoanProcessingFee

us-gaap:MarketableSecuritiesRealizedGainLoss

us-gaap:NetChangeInterestBearingDepositsDomestic

us-gaap:NetChangeNoninterestBearingDepositsDomestic

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOther

us-gaap:OccupancyNet

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherGeneralAndAdministrativeExpense

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoninterestExpense

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfLoansHeldForSale
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ProceedsFromSaleOfLoansReceivable

us-gaap:ProceedsFromSaleOfOtherRealEstate

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProfessionalFees

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

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:RepaymentsOfNotesPayable

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
dei:EntityCommonStockSharesOutstanding
us-gaap:ConsolidatedEntities
si:CommonEquityTierOneCapitalRequiredforCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
si:CommonEquityTierOneCapitalRequiredtobeWellCapitalizedToRiskWeightedAssets

si:DebtSecuritiesAvailableforsaleUnrealizedLossPositionDeclineInFairValuePercent

si:DebtSecuritiesIssuedInExcessOf10PercentOfShareholdersEquityFairValue

si:DeferredTaxLiabilitiesDeferredLoanFees

si:DeferredTaxLiabilitiesFHLBStockDividends

si:DeferredTaxLiabilitiesInterestRateCapAndAvailableForSaleSecurities

si:DepositsOfTenLargestDepositors

si:FinancingReceivableAllowanceForCreditLossToLoansRatio

si:FinancingReceivableBeforeAllowanceForCreditLossAfterDeferredFees
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

si:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAfterDeferredFees
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName
si:FinancingReceivableModificationOtherThanTroubledDebtRestructuringRatioToGrossLoansHeldForInvestment
us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName
si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringRatiotoGrossLoansHeldforInvestmentPercentageStillunderModification
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName
si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringStillunderModification
us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName

si:FinancingReceivableRelatedParties

si:InterestBearingDomesticDepositMoneyMarketAndSavings

si:InterestPayableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

si:InterestReceivableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

si:LoansAndLeasesReceivableAccruedInterest
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
si:LoansHeldForInvestmentMeasurementInput
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

si:LowIncomeHousingTaxCreditInvestment
us-gaap:FairValueByFairValueHierarchyLevel
si:OtherRealEstateOwnedFairValueDisclosure

si:ProportionOfTotalDepositsOfDepositsFromDigitalCurrencyExchangesPercent

si:ProportionOfTotalDepositsOfTenLargestDepositorsPercent

us-gaap:AccruedLiabilitiesAndOtherLiabilities
us-gaap:ConsolidatedEntities
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
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:FinancialInstrument
us-gaap:ConsolidatedEntities
us-gaap:Capital
us-gaap:ConsolidatedEntities
us-gaap:CapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
us-gaap:CapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:CashAndCashEquivalents
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CashAndDueFromBanks
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapital
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapitalRatio
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized
us-gaap:ShortTermDebtType
us-gaap:DebtInstrumentCollateralAmount
si:Organization, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
si:Organization, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate
us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsStateTaxes

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:Deposits

us-gaap:DepositsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:VariableRate
us-gaap:DerivativeFloorInterestRate
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd

us-gaap:FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1

us-gaap:FederalHomeLoanBankAdvancesLongTerm

us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock

us-gaap:FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss

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

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

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

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment

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

us-gaap:FinancingReceivableDeferredIncome

us-gaap:FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
us-gaap:Collateral
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:InternalCreditAssessment

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

us-gaap:FinancingReceivableModificationsRecordedInvestment

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

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

us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FairValueByAssetClass
us-gaap:HedgedAssetFairValueHedge
us-gaap:FairValueByAssetClass
us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease

us-gaap:ImpairedFinancingReceivableRecordedInvestment

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

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance

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

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

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

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

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositLiabilitiesDomestic

us-gaap:InterestBearingDepositsInBanks

us-gaap:InterestBearingDomesticDepositCertificatesOfDeposits

us-gaap:InterestBearingDomesticDepositDemand

us-gaap:InterestPayableCurrentAndNoncurrent

us-gaap:InterestReceivable

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
us-gaap:ShortTermDebtType
us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:LoansAndLeasesReceivableAllowance

us-gaap:LoansAndLeasesReceivableDeferredIncome

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount
us-gaap:Collateral
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:InternalCreditAssessment

us-gaap:LoansAndLeasesReceivableNetReportedAmount

us-gaap:LoansAndLeasesReceivableRelatedParties

us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:LoansReceivableHeldForSaleAmount
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
si:Organization, us-gaap:Ownership, us-gaap:LongtermDebtType
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
us-gaap:Ownership, us-gaap:LongtermDebtType

us-gaap:NoninterestBearingDepositLiabilities

us-gaap:NotesReceivableGross
us-gaap:Collateral
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:InternalCreditAssessment

us-gaap:NotesReceivableNet

us-gaap:OffBalanceSheetCreditLossLiability

us-gaap:OtherRealEstate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
us-gaap:OtherRealEstateOwnedMeasurementInput
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
us-gaap:PreferredStockLiquidationPreference

us-gaap:RelatedPartyDepositLiabilities
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock
us-gaap:SaleOfStockPricePerShare
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SubordinatedDebt
us-gaap:ConsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapital
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
us-gaap:ConsolidatedEntities
us-gaap:TierOneLeverageCapitalToAverageAssets
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacy
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalized
us-gaap:ConsolidatedEntities
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:TimeDepositMaturitiesYearFive

us-gaap:TimeDepositMaturitiesYearThree

us-gaap:TimeDepositMaturitiesYearTwo

us-gaap:TimeDeposits

us-gaap:TradingSecuritiesDebt
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:UnusedCommitmentsToExtendCredit
us-gaap:LongtermDebtType

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Property Plant And Equipment Net
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInFinancingActivities
Proceeds From Payments For Other Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four
BanksAndOrInsurance
Interest And Dividend Income Operating
AssetsBanks
Property Plant And Equipment Net
LiabilitiesBanks
Deposits

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,us-gaap:CommonClassANANA0.188NANANA0.178NANANANANANANA
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,us-gaap:CommonClassBNANA0.001NANANA0.009NANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▂▂▂▂▂▁0.2650.2480.1880.1860.1840.1840.1780.167NANA0.166NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassBNANA0.0010.0010.0030.0030.0090.012NANA0.012NANANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▃▂▂▂▂▁26.50824.8218.7718.62718.37918.37117.77516.654NANA16.629NANANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▁▁▁▃▃▆█0.00.00.0640.0640.2970.2970.8931.19NANA1.19NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▃▂▂▂▂▁26.50824.8218.7718.62718.37918.37117.77516.654NANA16.629NANANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▁▁▁▃▃▆█0.00.00.0640.0640.2970.2970.8931.19NANA1.19NANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁26.10223.01NA19.13419.10619.117NA18.24618.25718.258NA18.254NANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁25.70722.504NA18.68218.67218.668NA17.8417.83617.818NA17.808NANA
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▄▄0.0440.044NANA0.2380.235NANANANANANANANA
us-gaap:EarningsPerShareBasic █▅▄▃▂▁▁▃▂▅▄▃▂▂0.810.560.490.380.290.240.20.370.290.530.450.350.250.28
us-gaap:EarningsPerShareDiluted █▅▄▃▂▁▁▃▂▅▄▃▂▂0.80.550.470.370.290.230.190.360.280.520.440.340.250.27
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompany▇█▄▄▁▁▁▁4.761e-055.4229999999999994e-052.2879999999999998e-052.4030000000000002e-052.486e-072.535e-072.621e-072.5280000000000004e-07NANA2.496e-07NANANA
 us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:Subsidiaries▇█▄▄▁▁▁▁4.7289999999999996e-055.3240000000000005e-052.271e-052.2820000000000002e-052.348e-072.3860000000000003e-072.455e-072.43e-07NANA2.368e-07NANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:ParentCompany▇█▄▄▁▁▁▁4.8e-055.479e-052.3489999999999997e-052.468e-052.554e-072.605e-072.6900000000000004e-072.597e-07NANA2.577e-07NANANA
 us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities srt:Subsidiaries▇█▄▄▁▁▁▁4.769e-055.38e-052.332e-052.3469999999999997e-052.417e-072.455e-072.524e-072.5e-07NANA2.45e-07NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:AllocatedShareBasedCompensationExpense █▅▄▅▄▄▂▁▁▁▁▁0.50.30.20.30.20.1990.1110.0170.030.0190.0150.017NANA
us-gaap:ComprehensiveIncomeNetOfTax ▅▂▆▆█▆▁▆▆▅▄▄▄▃11.597-2.80913.45715.48823.2113.518-6.15115.89113.6969.8727.8076.644.3392.703
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.00.00.00.925NANA0.00.0NANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▄▃▃▂▂▁▃▂▅▃▃▂▁20.93311.4998.9788.7577.2926.1675.19.2896.84913.43410.5618.7376.2024.899
us-gaap:IncomeTaxExpenseBenefit ▃▁▂▅▅▅▅▆▅█▆▆▅▄-0.002-1.211-0.1411.6971.8261.7741.5022.6331.6933.9982.5412.4581.7111.356
us-gaap:IncomeTaxesPaidNet █▁3.353-0.006NANA3.098-0.022NANANANANANANANA
us-gaap:InterestAndFeeIncomeLoansAndLeases █▇▇▃▁▃▃▃▁▃▂▂17.15816.59716.37413.52711.7113.12113.07613.57411.68413.11112.74312.726NANA
us-gaap:InterestExpense ▁▁▁▁▄██▅▄▂▂▂▂▂0.2870.2910.30.3791.9634.5844.4822.9451.9040.7470.7380.7370.7840.87
us-gaap:InterestIncomeExpenseNet █▅▄▃▂▁▁▃▂▃▄▂▂▁30.38323.01521.90818.92616.05215.47815.6318.44317.56819.31620.86317.9716.04914.741
us-gaap:InterestPaidNet ▁█0.1490.444NANA1.8574.928NANANANANANANANA
us-gaap:NetIncomeLoss █▅▃▂▂▁▁▂▂▃▃▂▁▁20.93512.719.1197.065.4664.3933.5986.6565.1569.4368.026.2794.4913.543
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax ▁▁▂▃▃█▁▄▄▃▃▃-6.151-5.775-2.234-1.2311.58516.628-4.7854.2493.169-0.027-0.150.071NANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▂▁▅▆█▆▂▆▆▄▄▄-9.338-15.5194.3388.42817.7449.125-9.7499.2358.540.436-0.2130.361NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:Assets █▅▃▁▁▁▁▁12289.4767757.1525586.2352620.5732340.7132310.7082128.1272136.844NANA2004.318NANANA
us-gaap:Liabilities █▅▃▁▁▁▁▁11418.9697043.5315291.9362336.8122072.6082065.9561897.0911906.23NANA1813.072NANANA
us-gaap:LiabilitiesAndStockholdersEquity █▅▃▁▁▁▁▁12289.4767757.1525586.2352620.5732340.7132310.7082128.1272136.844NANA2004.318NANANA
us-gaap:StockholdersEquity █▆▂▂▂▂▂▂▁▁▁▁▁▁870.507713.621294.299283.761268.105244.752231.036230.614214.748201.137191.246183.384176.709173.059
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities srt:ParentCompany█▆▁▁▁▁▁▁864.828698.604263.763257.563250.335244.726240.135229.963NANA208.807NANANA
 us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities srt:Subsidiaries█▆▁▁▁▁▁▁858.796685.463261.791244.533236.281230.056224.605220.308NANA197.175NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ██▆▁▁▁▁▁4468.3174331.5222962.087197.482199.444166.2133.604160.258NANA674.42NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ██▆▁▁▁▁▁▁▂▂▂4468.3174331.5222962.087197.482199.444166.2133.604160.258341.361533.024674.42950.326NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:PropertyPlantAndEquipmentGross NANA7.753NANANA7.033NANANA6.61NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType si:EquipmentFurnitureAndSoftwareNANA6.381NANANA5.459NANANA4.613NANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovementsNANA1.372NANANA1.372NANANA1.795NANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment NANA5.681NANANA3.774NANANA2.954NANANA
us-gaap:PropertyPlantAndEquipmentNet ▁▂▃▇██▇▇1.6041.7582.0723.1223.3263.4063.2593.224NANA3.656NANANA
 us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities srt:ParentCompanyNANA308.74NANANA231.927NANANA195.872NANANA
us-gaap:OperatingLeaseRightOfUseAsset NANA1.7993.4783.8464.214.571NANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:TimeDepositMaturitiesYearOne NANA0.327NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:LongTermDebt NANA15.831NANANA19.53NANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA1.548NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA0.215NANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA0.026NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:StockholdersEquity █▆▂▂▂▂▂▂▁▁▁▁▁▁870.507713.621294.299283.761268.105244.752231.036230.614214.748201.137191.246183.384176.709173.059
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,us-gaap:CommonClassANANA0.188NANANA0.178NANANANANANANA
 us-gaap:CommonStockValue us-gaap:ConsolidatedEntities,us-gaap:StatementClassOfStock srt:ParentCompany,us-gaap:CommonClassBNANA0.001NANANA0.009NANANANANANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassA█▇▂▂▂▂▂▁0.2650.2480.1880.1860.1840.1840.1780.167NANA0.166NANANA
 us-gaap:CommonStockValue us-gaap:StatementClassOfStock us-gaap:CommonClassBNANA0.0010.0010.0030.0030.0090.012NANA0.012NANANA
us-gaap:AdditionalPaidInCapital █▆▁▁▁▁▁▁697.07551.798129.726132.647132.479132.336132.138125.573NANA125.665NANANA
us-gaap:RetainedEarningsAccumulatedDeficit █▆▄▃▂▂▁▁151.993131.058118.348109.229102.16996.70392.3188.712NANA67.464NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▅█▇▆▃▁▃21.17930.51746.03641.69833.2715.5266.40116.15NANA-2.061NANANA
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁█144.005423.54NANANANANANANANANANANA107.884
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▁0.4960.29NA0.2590.2010.199NA0.0170.030.019NA0.0170.0780.002
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▆▃▁█▅▅▅▆▆▅143.462-20.061-191.762-338.62116.244-65.176-70.36-58.02412.689-11.167-30.162NANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▇██████▇██-4520.645-786.692.59176.54-80.927-68.78641.5261.429-540.431-77.025-90.498NANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▆▂▁▁▁▁▂▁▁4513.9782176.1862953.776260.118-2.073166.5582.18-124.508336.079-53.204-155.246NANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▂▅█▂▂▂▂▁▁▁▁136.7951369.4352764.605-1.96233.24432.596-26.654-181.103-191.663-141.396-275.906NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:DeferredIncomeTaxExpenseBenefit NANANA-0.4280.1320.4870.549-0.3520.168-0.0060.297NANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▆▃▁█▅▅▅▆▆▅143.462-20.061-191.762-338.62116.244-65.176-70.36-58.02412.689-11.167-30.162NANANA
us-gaap:NetIncomeLoss █▅▃▂▂▁▁▂▂▃▃▂▁▁20.93512.719.1197.065.4664.3933.5986.6565.1569.4368.026.2794.4913.543
us-gaap:ShareBasedCompensation █▅▄▅▄▄▂▁▁▁▁0.4960.290.2250.2590.2010.1990.1110.0170.030.0190.015NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▇██████▇██-4520.645-786.692.59176.54-80.927-68.78641.5261.429-540.431-77.025-90.498NANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▁▂▂▂▃▂▂▃▃█0.1440.0320.1280.1230.2740.3910.2710.1850.3220.4351.18NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities █▄▆▂▁▁▁▁▂▁▁4513.9782176.1862953.776260.118-2.073166.5582.18-124.508336.079-53.204-155.246NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31

Common Stock Value

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

srt:ParentCompany, us-gaap:CommonClassA


Common
Period End2020-12-312019-12-31
Value188000.0178000.0
Percentage of CommonStockValue100.0100.0
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany us-gaap:CommonClassA0.00.0

srt:ParentCompany, us-gaap:CommonClassB


Common
Period End2020-12-312019-12-31
Value1000.09000.0
Percentage of CommonStockValue0.55.1
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany us-gaap:CommonClassB0.00.0

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value265000.0248000.0188000.0186000.0184000.0184000.0178000.0167000.0166000.0
Percentage of CommonStockValue0.00.0100.00.00.00.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


Common
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1000.01000.03000.03000.09000.012000.012000.0
Percentage of CommonStockValue0.50.00.00.05.10.00.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value262418181818171616
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.00.00.0640.0640.2970.2970.8931.191.19
Percentage of CommonStockSharesIssued0.00.00.30.31.61.65.07.17.2

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value262418181818171616
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.00.00.0640.0640.2970.2970.8931.191.19
Percentage of CommonStockSharesOutstanding0.00.00.30.31.61.65.07.17.2

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value262319191918181818
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value252218181817171717
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-06-302020-03-31
Value44000.044000.0238000.0235000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EmployeeStockOption


Antidilutive
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value165000.0238000.0235000.0110000.0110000.0110000.0114000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.0100.0100.00.00.00.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.810.560.490.380.290.240.20.370.290.530.450.350.250.28
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.80.550.470.370.290.230.190.360.280.520.440.340.250.27
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Tier One Risk Based Capital To Risk Weighted Assets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets

srt:ParentCompany


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47.6154.2322.8824.030.24860.25350.26210.25280.2496
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47.2953.2422.7122.820.23480.23860.24550.2430.2368
Percentage of TierOneRiskBasedCapitalToRiskWeightedAssets99.398.299.395.094.494.193.796.194.9

Capital To Risk Weighted Assets

us-gaap:CapitalToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:CapitalToRiskWeightedAssets

srt:ParentCompany


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value48.054.7923.4924.680.25540.26050.2690.25970.2577
Percentage of CapitalToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47.6953.823.3223.470.24170.24550.25240.250.245
Percentage of CapitalToRiskWeightedAssets99.498.299.395.194.694.293.896.395.1

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value500000.0300000.0200000.0300000.0200000.0199000.0111000.017000.030000.019000.015000.017000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating1.61.30.91.61.11.00.60.10.20.10.10.1

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11-2.80913152313-6.15115139.8727.8076.644.3392.703
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating37.8-12.160.680.2128.867.4-30.674.370.349.236.135.525.817.3

us-gaap:ComprehensiveIncomeNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Comprehensive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-9.338-15.5198.428179.1259.2358.540.4360.361-0.152-0.84
Percentage of ComprehensiveIncomeNetOfTax-80.5552.554.476.467.558.162.44.45.4-3.5-31.1
Percentage of InterestAndDividendIncomeOperating-30.4-66.643.798.545.543.243.92.21.9-0.9-5.4
Percentage of InterestAndDividendIncomeOperating us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Comprehensive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value20127.065.4664.3936.6565.1569.4366.2794.4913.543
Percentage of ComprehensiveIncomeNetOfTax180.5-452.545.623.632.541.937.695.694.6103.5131.1
Percentage of InterestAndDividendIncomeOperating68.354.536.630.321.931.126.547.033.626.722.7
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value000925000.000
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.00.0100.00.00.0
Percentage of InterestAndDividendIncomeOperating0.00.00.04.60.00.0

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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20118.9788.7577.2926.1675.19.2896.84913108.7376.2024.899
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating68.349.340.445.440.530.725.443.435.267.048.946.736.831.4

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2000.0-1211000.0-141000.01697000.01826000.01774000.01502000.02633000.01693000.03998000.02541000.02458000.01711000.01356000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-0.0-5.2-0.68.810.18.87.512.38.719.911.813.110.28.7

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-06-302020-03-31
Value3353000.0-6000.03098000.0-22000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating10.9-0.017.2-0.1

Interest And Fee Income Loans And Leases

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value171616131113131311131212
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating55.971.273.770.165.065.465.063.560.065.359.068.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.2870.2910.30.3791.9634.5844.4822.9451.9040.7470.7380.7370.7840.87
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.91.21.42.010.922.822.313.89.83.73.43.94.75.6

Interest Income Expense Net

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeExpenseNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3023211816151518171920171614
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating99.198.898.698.089.177.277.786.290.296.396.696.195.394.4

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value149000.0444000.01857000.04928000.0
Percentage of InterestPaidNet100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.51.910.324.6

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20129.1197.065.4664.3933.5986.6565.1569.4368.026.2794.4913.543
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating68.354.541.136.630.321.917.931.126.547.037.133.626.722.7

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-6.151-5.775-2.234-1.2311.58516-4.7854.2493.169-0.027-0.150.071
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-20.1-24.8-10.1-6.48.882.9-23.819.916.3-0.1-0.70.4

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-9.338-15.5194.3388.428179.125-9.7499.2358.540.436-0.2130.361
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-30.4-66.619.543.798.545.5-48.543.243.92.2-1.01.9

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1228977575586262023402310212821362004
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities

srt:ParentCompany


Assetsus-gaap:
Period End2020-12-312019-12-312018-12-31
Value310251214
Percentage of Assets5.611.810.7
Percentage of Assets5.611.810.7
Percentage of Assets srt:ParentCompany100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1141870435291233620722065189719061813
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets92.990.894.789.288.589.489.189.290.5

us-gaap:Liabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilitiesus-gaap:
Period End2020-12-312019-12-312018-12-31
Value162022
Percentage of Liabilities0.31.11.3
Percentage of Assets0.31.01.1
Percentage of Assets srt:ParentCompany5.48.310.7

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1228977575586262023402310212821362004
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Liabilities
Period End2020-12-312019-12-312018-12-31
Value310251214
Percentage of LiabilitiesAndStockholdersEquity5.611.810.7
Percentage of Assets5.611.810.7
Percentage of Assets srt:ParentCompany100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value87071329428326824423123021420119118317617373
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.19.25.310.811.510.610.910.80.00.09.50.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-31
Value294231191
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets5.310.99.5
Percentage of Assets srt:ParentCompany94.691.789.3

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2650.2480.1880.1860.1840.1840.1780.1670.1660.1660.1660.1660.1660.1650.062
Percentage of StockholdersEquity0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0010.0010.0030.0030.0090.0120.0120.0120.0120.0120.0120.0120.03
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value172.33-0.276-0.461
Percentage of StockholdersEquity5.81.0-0.1-0.6
Percentage of Assets0.30.1-0.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value284.071-1.785-0.756
Percentage of StockholdersEquity9.81.8-0.9-1.0
Percentage of Assets0.50.2-0.10.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2130464133156.401166.915-1.625-2.061-1.848-2.209-2.057-1.217
Percentage of StockholdersEquity2.44.315.614.712.46.32.87.03.2-0.8-1.1-1.0-1.3-1.2-1.6
Percentage of Assets0.20.40.81.61.40.70.30.80.00.0-0.10.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value69755112913213213213212512512512512512512629
Percentage of StockholdersEquity80.177.344.146.749.454.157.254.558.562.565.768.571.173.040.4
Percentage of Assets5.77.12.35.15.75.76.25.90.00.06.30.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15113111810910296928882766759534845
Percentage of StockholdersEquity17.518.440.238.538.139.540.038.538.238.235.332.430.128.161.2
Percentage of Assets1.21.72.14.24.44.24.34.20.00.03.40.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Tier One Risk Based Capital

us-gaap:TierOneRiskBasedCapital us-gaap:ConsolidatedEntities

us-gaap:TierOneRiskBasedCapital

srt:ParentCompany


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value864698263257250244240229208
Percentage of TierOneRiskBasedCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.09.04.79.810.710.611.310.810.4
Percentage of Assets srt:ParentCompany0.00.084.80.00.00.095.40.097.5

srt:Subsidiaries


Tier
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value858685261244236230224220197
Percentage of TierOneRiskBasedCapital99.398.199.394.994.494.093.595.894.4
Percentage of Assets7.08.84.79.310.110.010.610.39.8
Percentage of Assets srt:Subsidiaries0.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value446843312962197199166133160674
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.455.853.07.58.57.26.37.533.6

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value446843312962197199166133160341533674950797
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.455.853.07.58.57.26.37.50.00.033.60.00.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-312017-12-31
Value1.99119152.731
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents0.114.32.30.3
Percentage of Assets0.00.90.80.0
Percentage of Assets srt:ParentCompany0.67.67.20.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2020-12-312019-12-312018-12-31
Value7753000.07033000.06610000.0
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0
Percentage of Assets0.10.30.3

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

si:EquipmentFurnitureAndSoftware


Property
Period End2020-12-312019-12-312018-12-31
Value6381000.05459000.04613000.0
Percentage of PropertyPlantAndEquipmentGross82.377.669.8
Percentage of Assets0.10.30.2
Percentage of Assets si:EquipmentFurnitureAndSoftware0.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-312018-12-31
Value1372000.01372000.01795000.0
Percentage of PropertyPlantAndEquipmentGross17.719.527.2
Percentage of Assets0.00.10.1
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2020-12-312019-12-312018-12-31
Value5681000.03774000.02954000.0
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0
Percentage of Assets0.10.20.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1604000.01758000.02072000.03122000.03326000.03406000.03259000.03224000.03656000.0
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.10.10.10.20.20.2

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:ConsolidatedEntities

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

srt:ParentCompany


Investments
Period End2020-12-312019-12-312018-12-31
Value308231195
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0
Percentage of Assets5.510.99.8
Percentage of Assets srt:ParentCompany99.392.191.5

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value1799000.03478000.03846000.04210000.04571000.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.20.20.2

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value332015139.6837.097.6477.0324.741
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.50.40.30.40.30.2

us-gaap:OtherAssets us-gaap:ConsolidatedEntities

srt:ParentCompany


Other
Period End2020-12-312019-12-312018-12-31
Value0.2360.8162.904
Percentage of OtherAssets1.510.761.3
Percentage of Assets0.00.00.1
Percentage of Assets srt:ParentCompany0.10.31.4

Time Deposit Maturities Year One

us-gaap:TimeDepositMaturitiesYearOne

us-gaap:TimeDepositMaturitiesYearOne


Time
Period End2020-12-31
Value327000.0
Percentage of TimeDepositMaturitiesYearOne100.0
Percentage of Assets0.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-31
Value1519
Percentage of LongTermDebt100.0100.0
Percentage of Assets0.30.9

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-31
Value1548000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-31
Value215000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0
Percentage of Assets0.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-31
Value26000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0
Percentage of Assets0.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3376000.03770000.04146000.04515000.04881000.05237000.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.20.20.20.2

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-31
Value3537000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-31
Value161000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0
Percentage of Assets0.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value87071329428326824423123021420119118317617373
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.19.25.310.811.510.610.910.80.00.09.50.00.00.00.0

us-gaap:StockholdersEquity us-gaap:ConsolidatedEntities

srt:ParentCompany


Stockholders
Period End2020-12-312019-12-312018-12-31
Value294231191
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets5.310.99.5
Percentage of Assets srt:ParentCompany94.691.789.3

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.2650.2480.1880.1860.1840.1840.1780.1670.1660.1660.1660.1660.1660.1650.062
Percentage of StockholdersEquity0.00.00.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.0010.0010.0030.0030.0090.0120.0120.0120.0120.0120.0120.0120.03
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedGainLossNetCashFlowHedgeParent


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value172.33-0.276-0.461
Percentage of StockholdersEquity5.81.0-0.1-0.6
Percentage of Assets0.30.1-0.00.0
Percentage of Assets us-gaap:AccumulatedGainLossNetCashFlowHedgeParent0.00.00.00.0

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-31
Value284.071-1.785-0.756
Percentage of StockholdersEquity9.81.8-0.9-1.0
Percentage of Assets0.50.2-0.10.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2130464133156.401166.915-1.625-2.061-1.848-2.209-2.057-1.217
Percentage of StockholdersEquity2.44.315.614.712.46.32.87.03.2-0.8-1.1-1.0-1.3-1.2-1.6
Percentage of Assets0.20.40.81.61.40.70.30.80.00.0-0.10.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value69755112913213213213212512512512512512512629
Percentage of StockholdersEquity80.177.344.146.749.454.157.254.558.562.565.768.571.173.040.4
Percentage of Assets5.77.12.35.15.75.76.25.90.00.06.30.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value15113111810910296928882766759534845
Percentage of StockholdersEquity17.518.440.238.538.139.540.038.538.238.235.332.430.128.161.2
Percentage of Assets1.21.72.14.24.44.24.34.20.00.03.40.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue us-gaap:ConsolidatedEntities, us-gaap:StatementClassOfStock

us-gaap:CommonStockValue

srt:ParentCompany, us-gaap:CommonClassA


Common
Period End2020-12-312019-12-31
Value188000.0178000.0
Percentage of CommonStockValue100.0100.0
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany us-gaap:CommonClassA0.00.0

srt:ParentCompany, us-gaap:CommonClassB


Common
Period End2020-12-312019-12-31
Value1000.09000.0
Percentage of CommonStockValue0.55.1
Percentage of Assets0.00.0
Percentage of Assets srt:ParentCompany us-gaap:CommonClassB0.00.0

us-gaap:CommonStockValue us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value265000.0248000.0188000.0186000.0184000.0184000.0178000.0167000.0166000.0
Percentage of CommonStockValue0.00.0100.00.00.00.0100.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


Common
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1000.01000.03000.03000.09000.012000.012000.0
Percentage of CommonStockValue0.50.00.00.05.10.00.0
Percentage of Assets0.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB0.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value697551129132132132132125125
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.77.12.35.15.75.76.25.96.3

us-gaap:AdditionalPaidInCapital us-gaap:ConsolidatedEntities

srt:ParentCompany


Additional
Period End2020-12-312019-12-312018-12-31
Value129132125
Percentage of AdditionalPaidInCapital100.0100.0100.0
Percentage of Assets2.36.26.3
Percentage of Assets srt:ParentCompany41.752.558.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value15113111810910296928867
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.72.14.24.44.24.34.23.4

us-gaap:RetainedEarningsAccumulatedDeficit us-gaap:ConsolidatedEntities

srt:ParentCompany


Retained
Period End2020-12-312019-12-312018-12-31
Value1189267
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0
Percentage of Assets2.14.33.4
Percentage of Assets srt:ParentCompany38.136.731.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2130464133156.40116-2.061
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.40.81.61.40.70.30.8-0.1

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:ConsolidatedEntities

srt:ParentCompany


Accumulated
Period End2020-12-312019-12-312018-12-31
Value466.401-2.061
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0
Percentage of Assets0.80.3-0.1
Percentage of Assets srt:ParentCompany14.82.5-1.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-302021-03-312018-03-31
Value144423107
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0
Percentage of Assets0.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312018-03-31
Value0.0150.0580.095
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.00.1
Percentage of Assets0.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

si:SeriesANonCumulativePerpetualPreferredStockDepositaryShare, us-gaap:SubsequentEvent


Stock
Period End2021-08-04
Value200
Percentage of StockIssuedDuringPeriodValueNewIssues0.0
Percentage of Assets0.0
Percentage of Assets si:SeriesANonCumulativePerpetualPreferredStockDepositaryShare us-gaap:SubsequentEvent0.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonClassA, si:FollowOnOfferingIncludingOverAllotmentOption


Stock
Period End2021-01-26
Value287
Percentage of StockIssuedDuringPeriodValueNewIssues0.0
Percentage of Assets0.0
Percentage of Assets us-gaap:CommonClassA si:FollowOnOfferingIncludingOverAllotmentOption0.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312018-03-31
Value143423107
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.099.9
Percentage of Assets0.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value496000.0290000.0259000.0201000.0199000.017000.030000.019000.017000.078000.02000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value496000.0290000.0259000.0201000.0199000.017000.030000.019000.017000.078000.02000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value143-20.061-191.762-338.62116-65.176-70.36-58.02412-11.167-30.162
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating467.8-86.1-863.5-1754.1645.3-324.9-349.8-271.365.2-55.7-139.6

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-4520.645-786.692.59176-80.927-68.786411.429-540.431-77.025-90.498
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-14739.6-3375.511.7396.5-449.2-342.9206.56.7-2775.4-383.9-419.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value451321762953260-2.0731662.18-124.508336-53.204-155.246
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating14717.99337.413300.51347.4-11.5830.210.8-582.11726.0-265.2-718.7

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value13613692764-1.9623332-26.654-181.103-191.663-141.396-275.906
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating446.05875.912448.7-10.2184.5162.5-132.5-846.8-984.3-704.8-1277.3

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-428000.0132000.0487000.0549000.0-352000.0168000.0-6000.0297000.0
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value143-20.061-191.762-338.62116-65.176-70.36-58.02412-11.167-30.162
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating467.8-86.1-863.5-1754.1645.3-324.9-349.8-271.365.2-55.7-139.6

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20129.1197.065.4664.3933.5986.6565.1569.4368.026.2794.4913.543
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating68.354.541.136.630.321.917.931.126.547.037.133.626.722.7

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value496000.0290000.0225000.0259000.0201000.0199000.0111000.017000.030000.019000.015000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-4520.645-786.692.59176-80.927-68.786411.429-540.431-77.025-90.498
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-14739.6-3375.511.7396.5-449.2-342.9206.56.7-2775.4-383.9-419.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value144000.032000.0128000.0123000.0274000.0391000.0271000.0185000.0322000.0435000.01180000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value451321762953260-2.0731662.18-124.508336-53.204-155.246
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating14717.99337.413300.51347.4-11.5830.210.8-582.11726.0-265.2-718.7

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0-10.5-7.319.40.250.2880.0020.2830.2470.298-0.0140.281
Percentage of EffectiveIncomeTaxRateContinuingOperations0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value14.0314.038.017.427.357.27.545.55.54
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0

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
Value6.4101514114.60.4
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

si:DepreciationAndAmortizationExcludingAmortizationOfSecuritiesAndLoansPremiumsAndDiscounts

si:DepreciationAndAmortizationExcludingAmortizationOfSecuritiesAndLoansPremiumsAndDiscounts


Depreciation
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value633000.0644000.0965000.0740000.0830000.01902000.0275000.0241000.0255000.0330000.0
Percentage of DepreciationAndAmortizationExcludingAmortizationOfSecuritiesAndLoansPremiumsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:DerivativeInstrumentUpfrontFeePaid us-gaap:DerivativeInstrumentRisk

si:DerivativeInstrumentUpfrontFeePaid

us-gaap:InterestRateCap


Derivative
Period End2021-06-302021-03-31
Value159.5
Percentage of DerivativeInstrumentUpfrontFeePaid100.0100.0

si:FeesAndCommissionsDeposits

si:FeesAndCommissionsDeposits


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value117.1243.8443.2932.4381.7661.4871.6571.1710.9870.780.688
Percentage of FeesAndCommissionsDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:FeesAndCommissionsOffBalanceSheetDeposits

si:FeesAndCommissionsOffBalanceSheetDeposits


Fees
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value01000.07000.070000.0183000.0283000.0412000.0759000.0739000.0573000.0
Percentage of FeesAndCommissionsOffBalanceSheetDeposits0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:FinancingReceivableModificationOtherThanTroubledDebtRestructuringPostmodification us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName

si:FinancingReceivableModificationOtherThanTroubledDebtRestructuringPostmodification

us-gaap:PaymentDeferral, si:COVID19RelatedModification


Financing
Period End2020-12-312020-09-30
Value0.66.1
Percentage of FinancingReceivableModificationOtherThanTroubledDebtRestructuringPostmodification100.0100.0

si:FinancingReceivableRelatedPartiesAdditions

si:FinancingReceivableRelatedPartiesAdditions


Financing
Period End2021-06-302021-03-31
Value02000000.0
Percentage of FinancingReceivableRelatedPartiesAdditions0.0100.0

si:FinancingReceivableRelatedPartiesProceeds

si:FinancingReceivableRelatedPartiesProceeds


Financing
Period End2021-06-302021-03-31
Value500000.01500000.0
Percentage of FinancingReceivableRelatedPartiesProceeds100.0100.0

si:InterestIncomeSecuritiesOperating us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

si:InterestIncomeSecuritiesOperating

us-gaap:DesignatedAsHedgingInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Interest
Period End2020-12-312020-09-302019-12-312019-09-30
Value1066000.01056000.0-144000.0-374000.0
Percentage of InterestIncomeSecuritiesOperating100.0100.0100.0100.0

si:OtherGainsLossesNet

si:OtherGainsLossesNet


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value751000.01141000.03498000.02885000.0
Percentage of OtherGainsLossesNet100.0100.0100.0100.0

si:PaymentsToAcquireFederalHomeLoanAndFederalReserveBankStock

si:PaymentsToAcquireFederalHomeLoanAndFederalReserveBankStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.0121.343.230.0050.00.00.00.6030.0
Percentage of PaymentsToAcquireFederalHomeLoanAndFederalReserveBankStock100.0100.0100.0100.00.00.00.0100.00.0

si:ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock

si:ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses

us-gaap:CommonClassA, us-gaap:SubsequentEvent, si:AtTheMarketProgram


Proceeds
Period End2021-05-11
Value60
Percentage of ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses100.0

us-gaap:CommonClassA, us-gaap:SubsequentEvent, si:FollowOnOfferingIncludingOverAllotmentOption


Proceeds
Period End2021-01-26
Value287
Percentage of ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses0.0

si:ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonClassA, si:AtTheMarketProgram


Proceeds
Period End2021-03-31
Value153
Percentage of ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses0.0

us-gaap:CommonClassA, si:FollowOnOfferingIncludingOverAllotmentOption


Proceeds
Period End2021-01-26
Value287
Percentage of ProceedsFromIssuanceOfCommonStockBeforeDeductingUnderwritingDiscountsAndOfferingExpenses0.0

si:ProceedsFromLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment

si:ProceedsFromLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.00.00.03622201011
Percentage of ProceedsFromLoansHeldForSalePreviouslyClassifiedAsHeldForInvestment0.00.00.0100.0100.0100.0100.0100.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments


Accretion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-8456000.0-1212000.0-949000.0-972000.0-1290000.0-679000.0-732000.0-712000.0-419000.0-130000.0-77000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet

us-gaap:AmortizationOfDeferredLoanOriginationFeesNet


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-60000.0-250000.0-136000.0-172000.0-118000.0-399000.0-272000.0-1030000.0262000.0102000.0763000.0
Percentage of AmortizationOfDeferredLoanOriginationFeesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1 us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

us-gaap:InterestRateCap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, si:InterestIncomeTaxExempt


Change
Period End2021-06-302021-03-31
Value-743000.0743000.0
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1100.0100.0

us-gaap:InterestRateCap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, si:InterestIncomeTaxable


Change
Period End2021-06-302021-03-31
Value-496000.01053000.0
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments166.8141.7

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1 us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:InterestRateCap, us-gaap:FairValueHedging, si:InterestIncomeTaxExempt


Change
Period End2021-06-302021-03-31
Value743000.0-743000.0
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1100.0100.0

us-gaap:InterestRateCap, us-gaap:FairValueHedging, si:InterestIncomeTaxable


Change
Period End2021-06-302021-03-31
Value487000.0-1072000.0
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge165.5144.3

us-gaap:CommunicationsAndInformationTechnology

us-gaap:CommunicationsAndInformationTechnology


Communications
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1796000.01621000.01443000.01389000.01313000.01261000.01149000.01298000.01123000.01037000.0939000.0703000.0
Percentage of CommunicationsAndInformationTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:StatementGeographical, us-gaap:Collateral, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

stpr:AZ, us-gaap:RealEstate, us-gaap:FinanceReceivables, us-gaap:CreditConcentrationRisk


Concentration
Period End2021-03-312020-03-31
Value4.40.066
Percentage of ConcentrationRiskPercentage1100.0100.0

stpr:CA, us-gaap:RealEstate, us-gaap:FinanceReceivables, us-gaap:CreditConcentrationRisk


Concentration
Period End2021-03-312020-03-31
Value64.70.744
Percentage of ConcentrationRiskPercentage11470.51127.3

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain


Debt
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value003500000.01200000.0722000.0178000.0
Percentage of DebtSecuritiesAvailableForSaleRealizedGain0.00.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedLoss


Debt
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302018-12-312018-09-30
Value00900000.0184000.016000.000
Percentage of DebtSecuritiesAvailableForSaleRealizedLoss0.00.0100.0100.0100.00.00.0

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:DerivativeExcludedComponentGainLossRecognizedInEarnings

us-gaap:InterestRateCap, us-gaap:FairValueHedging


Derivative
Period End2021-06-302021-03-31
Value-454000.0-25000.0
Percentage of DerivativeExcludedComponentGainLossRecognizedInEarnings100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred


Derivative
Period End2021-06-302021-03-312020-12-31
Value04800000.00
Percentage of DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred0.0100.00.0

us-gaap:DividendIncomeOperating

us-gaap:DividendIncomeOperating


Dividend
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value466000.0143000.0255000.0116000.0200000.0121000.0234000.0121000.0229000.0122000.0322000.0119000.0
Percentage of DividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments

us-gaap:EffectiveIncomeTaxRateReconciliationOtherAdjustments


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.31.90.7-2.80.0020.00700.003-0.020.0150.0010.001
Percentage of EffectiveIncomeTaxRateReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value-4046000.0-3003000.0-1619000.0-42000.0-20000.026000.0-28000.0-86000.0-469000.00
Percentage of EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent

us-gaap:EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value-19.3-26.1-5.1-0.5-0.0030.001-0.003-0.013-0.0160
Percentage of EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes

us-gaap:EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.6-3.9-2.47.20.0840.080.0020.0780.0760.0760.0010.075
Percentage of EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationTaxCredits

us-gaap:EffectiveIncomeTaxRateReconciliationTaxCredits


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.10.40.4-0.10.0090.0090.0010.0050.0060.00300.005
Percentage of EffectiveIncomeTaxRateReconciliationTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome

us-gaap:EffectiveIncomeTaxRateReconciliationTaxExemptIncome


Effective
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value1.93.00.15.60.0340
Percentage of EffectiveIncomeTaxRateReconciliationTaxExemptIncome100.0100.0100.0100.0100.00.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FederalDepositInsuranceCorporationPremiumExpense


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3844000.02296000.0658000.0209000.0182000.0123000.033000.039000.0168000.0175000.0152000.0214000.0
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding


Federal
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value-56.35846146317
Percentage of FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear


Federal
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.290.2078-0.01230.0145-0.0029
Percentage of FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear100.0100.0100.0100.0100.0

us-gaap:FeesAndCommissionsMortgageBankingAndServicing

us-gaap:FeesAndCommissionsMortgageBankingAndServicing


Fees
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value753000.0954000.0949000.0758000.0450000.0382000.0388000.0373000.0346000.0366000.0353000.0393000.0
Percentage of FeesAndCommissionsMortgageBankingAndServicing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0017000.000093000.0006000.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.00.0100.00.00.00.0100.00.00.0100.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0017000.000093000.0006000.0
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs0.00.0100.00.00.00.0100.00.00.0100.0

us-gaap:ForeclosedRealEstateExpense

us-gaap:ForeclosedRealEstateExpense


Foreclosed
Period End2020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-30
Value23000.0090000.075000.05000.0-15000.0-10000.0
Percentage of ForeclosedRealEstateExpense100.00.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfInvestments

us-gaap:GainLossOnSaleOfInvestments


Gain
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value02556000.01197000.0740000.0-16000.000
Percentage of GainLossOnSaleOfInvestments0.0100.0100.0100.0100.00.00.0

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GainLossOnSalesOfLoansNet


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0-96000.0-56000.0506000.0235000.0248000.0156000.0189000.012000.0416000.0
Percentage of GainLossOnSalesOfLoansNet0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableAverageRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value1815108.2948.91615151519
Percentage of ImpairedFinancingReceivableAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value202000.0211000.0111000.0441000.0126000.090000.0198000.0273000.0197000.0197000.0196000.0144000.0
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value17151.759107.8898.512-0.02151415-0.07318
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value0.2120.249-0.2691.4742.0432.3290.1032.6621.926
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment1.21.6-15.314.725.927.4-515.017.213.1

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value9.9049.7951.7564.711.9411.941-0.1077.6637.8367.878-0.299.094
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment55.262.699.847.024.622.8535.049.553.352.2397.349.9

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6.9314.9790.2713.3123.393.7310.054.3934.1333.5390.0563.677
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment38.731.815.433.143.043.8-250.028.428.123.4-76.720.2

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.880.6160.0010.5180.5150.511-0.0660.7760.8070.798-0.1050.951
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment4.93.90.15.26.56.0330.05.05.55.3143.85.2

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value200000.0210000.0110000.0440000.0124000.089000.0196000.0269000.0197000.0197000.0195000.0144000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value4000.05000.0-77000.029000.031000.042000.027000.0164000.017000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod2.02.4-70.06.625.047.213.861.08.6

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value133000.0128000.0103000.0377000.022000.021000.090000.079000.099000.097000.070000.093000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod66.561.093.685.717.723.645.929.450.349.235.964.6

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value63000.077000.084000.034000.071000.026000.079000.026000.081000.047000.0-7000.034000.0
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod31.536.776.47.757.329.240.39.741.123.9-3.623.6

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value365000.0322000.01000.0410000.0405000.0404000.08000.0312000.0363000.0438000.0-361000.01023000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value365000.064000.0065000.065000.066000.014000.022000.008000.0-3000.027000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment100.019.90.015.916.016.3175.07.10.01.80.82.6

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-129000.0258000.01000.0345000.0340000.0338000.0-6000.0290000.0363000.0430000.021000.0348000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment-35.380.1100.084.184.083.7-75.092.9100.098.2-5.834.0

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2000.01000.01000.01000.02000.01000.02000.04000.0001000.00
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2000.01000.01000.01000.02000.01000.02000.04000.0001000.00
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.0

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

us-gaap:IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4396000.02415000.01885000.01840000.01531000.01295000.01071000.01950000.01439000.02821000.02218000.01835000.0
Percentage of IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationOtherAdjustments

us-gaap:IncomeTaxReconciliationOtherAdjustments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-272000.0216000.0137000.0-242000.016000.041000.011000.030000.0-137000.0202000.09000.015000.0
Percentage of IncomeTaxReconciliationOtherAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes

us-gaap:IncomeTaxReconciliationStateAndLocalIncomeTaxes


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value341000.0-451000.0-49000.0629000.0613000.0494000.0436000.0724000.0519000.01018000.0825000.0651000.0
Percentage of IncomeTaxReconciliationStateAndLocalIncomeTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationTaxCredits

us-gaap:IncomeTaxReconciliationTaxCredits


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value16000.041000.0172000.0-5000.067000.056000.042000.043000.042000.043000.042000.043000.0
Percentage of IncomeTaxReconciliationTaxCredits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxReconciliationTaxExemptIncome

us-gaap:IncomeTaxReconciliationTaxExemptIncome


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value405000.0347000.0323000.0493000.0247000.00
Percentage of IncomeTaxReconciliationTaxExemptIncome100.0100.0100.0100.0100.00.0

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value6710000.0469000.0-3988000.02250000.0297000.087000.0-2711000.01217000.0-2232000.0398000.0-84000.0
Percentage of IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLoansFromOtherFederalHomeLoanBanks

us-gaap:IncreaseDecreaseInLoansFromOtherFederalHomeLoanBanks


Increase
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-10.0-350.0330-18.07529200.00.00.0
Percentage of IncreaseDecreaseInLoansFromOtherFederalHomeLoanBanks100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value414.119-0.4634.841.8820.5213-14.481
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value395000.0506000.041000.0452000.0434000.0449000.06000.0406000.0421000.0440000.0-14000.0446000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeOperating


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3023221918202021192021181615
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits

us-gaap:InterestExpenseDeposits


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value35000.046000.047000.057000.01652000.04051000.03793000.02385000.01194000.0341000.0401000.0400000.0
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm

us-gaap:InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value065000.044000.0227000.0374000.0172000.000
Percentage of InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesShortTerm0.0100.0100.0100.0100.0100.00.00.0

us-gaap:InterestExpenseMediumTermNotes

us-gaap:InterestExpenseMediumTermNotes


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value00036000.045000.0117000.0443000.0142000.093000.098000.0
Percentage of InterestExpenseMediumTermNotes0.00.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseSubordinatedNotesAndDebentures

us-gaap:InterestExpenseSubordinatedNotesAndDebentures


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value252000.0245000.0253000.0257000.0267000.0270000.0270000.0271000.0267000.0264000.0244000.0239000.0
Percentage of InterestExpenseSubordinatedNotesAndDebentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseSubordinatedNotesAndDebentures us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value101000.099000.065000.055000.0
Percentage of InterestExpenseSubordinatedNotesAndDebentures40.140.424.320.4

us-gaap:InterestExpenseSubordinatedNotesAndDebentures us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:DesignatedAsHedgingInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Interest
Period End2020-12-312020-09-302019-12-312019-09-30
Value99000.090000.040000.031000.0
Percentage of InterestExpenseSubordinatedNotesAndDebentures39.135.014.811.4

us-gaap:InterestIncomeDepositsWithFinancialInstitutions

us-gaap:InterestIncomeDepositsWithFinancialInstitutions


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1.5991.2790.3140.1960.4050.7240.6851.1833.0583.797
Percentage of InterestIncomeDepositsWithFinancialInstitutions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeDepositsWithFinancialInstitutions us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.140.1360.350.125
Percentage of InterestIncomeDepositsWithFinancialInstitutions8.810.686.417.3

us-gaap:InterestIncomeDepositsWithFinancialInstitutions us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:DesignatedAsHedgingInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Interest
Period End2020-12-312020-09-302019-12-312019-09-30
Value0.1360.134-0.01-0.154
Percentage of InterestIncomeDepositsWithFinancialInstitutions43.368.4-1.5-13.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3023211815151519171922171614
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxExempt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value3123000.01695000.01717000.01720000.01577000.048000.000
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.00.00.0

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestIncomeSecuritiesTaxable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value8.3243.5923.5483.7464.1236.0486.1176.514.5013.033
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.0731.0520.6710.117
Percentage of InterestIncomeSecuritiesTaxable12.929.316.31.9

us-gaap:LaborAndRelatedExpense

us-gaap:LaborAndRelatedExpense


Labor
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value10109.6378.8999.0028.9558.7738.2778.0828.7658.5637.259
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoanProcessingFee

us-gaap:LoanProcessingFee


Loan
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value280000.0174000.045000.060000.099000.0122000.0122000.047000.0118000.0125000.0221000.057000.0
Percentage of LoanProcessingFee100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesRealizedGainLoss

us-gaap:MarketableSecuritiesRealizedGainLoss


Marketable
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value002556000.01197000.0740000.0-16000.000
Percentage of MarketableSecuritiesRealizedGainLoss0.00.0100.0100.0100.0100.00.00.0

us-gaap:NetChangeInterestBearingDepositsDomestic

us-gaap:NetChangeInterestBearingDepositsDomestic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-32.172-1.357-2.3359.009-149.965-213.251764242-22.893-27.544
Percentage of NetChangeInterestBearingDepositsDomestic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetChangeNoninterestBearingDepositsDomestic

us-gaap:NetChangeNoninterestBearingDepositsDomestic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value440117552969601-182.083401-50.766-155.53597-86.897-126.777
Percentage of NetChangeNoninterestBearingDepositsDomestic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense

us-gaap:NoninterestExpense


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2119171413131312121313111111
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome

us-gaap:NoninterestIncome


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value128.094.8483.9645.4344.9313.132.5992.1547.8711.9912.1842.0011.387
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOther

us-gaap:NoninterestIncomeOther


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value8000.012000.055000.08000.039000.085000.0113000.038000.069000.061000.0107000.0114000.0
Percentage of NoninterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet

us-gaap:OccupancyNet


Occupancy
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value599000.0614000.03044000.0845000.0894000.0907000.0861000.0892000.01012000.0873000.0840000.0742000.0
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-4.438-13.4348.8761325-9.313-6.2086.967
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-3.187-9.7446.5729.65916-7.503-4.9644.986
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1251000.0-3690000.02304000.03898000.06475000.0-3007000.0-1984000.01997000.02135000.0200000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-2433000.0-2189000.0-1106000.0-472000.0636000.06667000.0-1910000.01701000.01275000.0-19000.0-61000.027000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-8.074-7.46-2.824-1.1872.73123-6.6955.954.444-0.046
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

si:CashFlowHedgeInterestRateFloor1, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.305-1.450.6386.096
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax-3.819.423.426.0

si:CashFlowHedgeInterestRateFloor2, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.221-5.82.55217
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax-15.177.793.475.3

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

si:CashFlowHedgeInterestRateFloor1, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.447-0.120.6386.09610-11.4132.50.0160.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax15.810.123.426.0-162.9-191.856.3-34.80.00.0

si:CashFlowHedgeInterestRateFloor2, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.789-0.482.55217-17.828161.8570.0140.00.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax63.340.493.475.3266.3283.041.8-30.40.00.0

us-gaap:InterestRateCap, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.001-0.003-0.013-0.280.036-0.035-0.28-0.113-0.2340.07
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax0.00.3-0.5-1.2-0.5-0.6-6.3245.70.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value510000.0504000.0516000.0516000.0510000.0171000.000
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.00.00.0

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax

us-gaap:InterestRateCap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument


Other
Period End2021-06-302021-03-31
Value-8998000.0375000.0
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value002556000.01197000.0740000.0-16000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax0.00.0100.0100.0100.0100.0

us-gaap:OtherGeneralAndAdministrativeExpense

us-gaap:OtherGeneralAndAdministrativeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1334000.01697000.01248000.01098000.01030000.01149000.01111000.0806000.0839000.0787000.0887000.0705000.0
Percentage of OtherGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value9000.0-891000.0-2093000.01023000.0972000.0168000.0961000.0-1205000.0-549000.0-354000.00
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:OtherNoninterestExpense

us-gaap:OtherNoninterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value812000.0497000.0410000.0403000.0347000.0373000.0323000.0288000.0301000.0279000.0249000.0240000.0
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value30403384321122511042122211011002698622630
Percentage of PaymentsForOriginationAndPurchasesOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

us-gaap:PaymentsForProceedsFromDerivativeInstrumentInvestingActivities


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value148.439-1.061-1.051-0.89-13.37-0.498-0.137182.555
Percentage of PaymentsForProceedsFromDerivativeInstrumentInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsForProceedsFromLoansAndLeases


Payments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-57.519114411.28720951235
Percentage of PaymentsForProceedsFromLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansReceivable

us-gaap:PaymentsForProceedsFromLoansReceivable


Payments
Period End2021-06-302021-03-312020-06-302020-03-31
Value11-18.11211441
Percentage of PaymentsForProceedsFromLoansReceivable100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value183000.01960000.03185000.091000.058000.01000.0-1000.043000.0115000.00-9000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value45468175.0650.017998112045811060
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2021-06-302021-03-312019-12-312018-12-31
Value1444236.4620.0
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonClassA, us-gaap:SubsequentEvent, si:FollowOnOfferingIncludingOverAllotmentOption


Proceeds
Period End2021-01-26
Value272
Percentage of ProceedsFromIssuanceOfCommonStock0.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:CommonClassA, si:AtTheMarketProgram


Proceeds
Period End2021-06-302021-03-31
Value144151
Percentage of ProceedsFromIssuanceOfCommonStock100.035.7

us-gaap:CommonClassA, si:FollowOnOfferingIncludingOverAllotmentOption


Proceeds
Period End2021-01-26
Value272
Percentage of ProceedsFromIssuanceOfCommonStock0.0

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock

si:SeriesANonCumulativePerpetualPreferredStockDepositaryShare, us-gaap:SubsequentEvent


Proceeds
Period End2021-08-04
Value193
Percentage of ProceedsFromIssuanceOfPreferredStockAndPreferenceStock100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value66211719137.9365.9655.8986.9555.4984.805
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1000.010000.033000.046000.059000.0306000.0-102000.022000.0-1109000.0
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.02021410310.00.00.00.0
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt0.00.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ProceedsFromSaleOfLoansHeldForSale

us-gaap:ProceedsFromSaleOfLoansHeldForSale


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3188335330111907115511531042920708606595
Percentage of ProceedsFromSaleOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfLoansReceivable us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ProceedsFromSaleOfLoansReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Proceeds
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.832117202127233663
Percentage of ProceedsFromSaleOfLoansReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfOtherRealEstate

us-gaap:ProceedsFromSaleOfOtherRealEstate


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0-19000.0128000.048000.015000.062000.0020000.0
Percentage of ProceedsFromSaleOfOtherRealEstate0.0100.0100.0100.0100.0100.00.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312019-12-312018-12-31
Value971000.0261000.0032000.0
Percentage of ProceedsFromStockOptionsExercised100.0100.00.0100.0

us-gaap:ProfessionalFees

us-gaap:ProfessionalFees


Professional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2594000.01717000.01163000.01207000.01105000.0985000.01198000.0889000.01073000.01445000.02132000.01507000.0
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses

us-gaap:ProvisionForLoanAndLeaseLosses


Provision
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value153000.00222000.0367000.00-858000.0152000.0267000.0-1675000.00
Percentage of ProvisionForLoanAndLeaseLosses100.00.0100.0100.00.0100.0100.0100.0100.00.0

us-gaap:ProvisionForLoanAndLeaseLosses us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value885000.0-1571000.01154000.014000.0337000.0114000.0075000.0-19000.0
Percentage of ProvisionForLoanAndLeaseLosses0.00.0754.20.0151.831.10.0-8.7-12.5

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-313000.01441000.0-119000.0-18000.0-1010000.0166000.00-970000.0-176000.083000.0-601000.00
Percentage of ProvisionForLoanAndLeaseLosses0.00.0-77.80.0-455.045.20.0113.1-115.831.135.90.0

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value19000.0-97000.0-737000.0309000.0760000.0162000.0017000.0-29000.010000.0-32000.00
Percentage of ProvisionForLoanAndLeaseLosses0.00.0-481.70.0342.344.10.0-2.0-19.13.71.90.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-375000.0389000.0-186000.0-83000.0-440000.0-80000.00282000.0-27000.041000.062000.00
Percentage of ProvisionForLoanAndLeaseLosses0.00.0-121.60.0-198.2-21.80.0-32.9-17.815.4-3.70.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-85000.0-50000.033000.023000.0133000.036000.00-226000.0368000.028000.0283000.00
Percentage of ProvisionForLoanAndLeaseLosses0.00.021.60.059.99.80.026.3242.110.5-16.90.0

us-gaap:ProvisionForLoanAndLeaseLosses us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-7000.0-21000.0-2000.02000.01000.01000.001000.0-18000.008000.00
Percentage of ProvisionForLoanAndLeaseLosses0.00.0-1.30.00.50.30.0-0.1-11.80.0-0.50.0

us-gaap:ConsumerPortfolioSegment


Provision
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0-1000.000001000.0-1000.000
Percentage of ProvisionForLoanAndLeaseLosses0.00.00.00.00.0-0.00.7-0.4-0.00.0

us-gaap:ProvisionForLoanAndLeaseLosses us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-124000.0-91000.010000.0-246000.0441000.0-32000.00-37000.052000.06000.0-59000.00
Percentage of ProvisionForLoanAndLeaseLosses0.00.06.50.0198.6-8.70.04.334.22.23.50.0

us-gaap:ProvisionForLoanLossesExpensed

us-gaap:ProvisionForLoanLossesExpensed


Provision
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value153000.00222000.0367000.00-858000.0152000.0267000.0-1675000.005000.0143000.0
Percentage of ProvisionForLoanLossesExpensed100.00.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0

us-gaap:RepaymentsOfNotesPayable

us-gaap:RepaymentsOfNotesPayable


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0003714000.0286000.0286000.00571000.0286000.0
Percentage of RepaymentsOfNotesPayable0.00.00.0100.0100.0100.00.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-31
Value6000.071000.0
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value15.9326.330
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value-5.95127.560
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-31
Value-0.2914.89
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value016.090
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice0.0100.00.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value-0.164.76-0.44
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value0127.560
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice0.0100.00.0

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfConvertibleSecurities

us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2021-03-312020-09-302020-03-312018-03-31
Value1000.02000.06000.011000.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities100.0100.0100.0100.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stock
Period End2021-03-312020-09-302020-03-312018-03-31
Value-1000.0-2000.0-6000.0-11000.0
Percentage of StockIssuedDuringPeriodValueConversionOfConvertibleSecurities-100.0-100.0-100.0-100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation


Stock
Period End2021-06-302021-03-31
Value788000.0-1699000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation100.0100.0

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2021-06-302021-03-31
Value2000.01000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation0.3-0.1

us-gaap:StockIssuedDuringPeriodValueShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-31
Value786000.0-1700000.0
Percentage of StockIssuedDuringPeriodValueShareBasedCompensation99.7100.1

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302018-09-302018-06-302018-03-31
Value-91000.0-58000.0-1000.0-42000.0-115000.018000.0-767000.041000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302018-09-302018-06-302018-03-31
Value-91000.0-58000.0-1000.0-43000.0-115000.018000.0-768000.041000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0102.4100.0100.0100.1100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

dei:EntityCommonStockSharesOutstanding

us-gaap:CommonClassA


Entity
Period End2020-08-052020-05-052020-03-032019-11-27
Value18181817
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0

us-gaap:CommonClassB


Entity
Period End2020-08-052020-05-052020-03-032019-11-27
Value0.0641970.2968360.2968360.892836
Percentage of EntityCommonStockSharesOutstanding0.31.61.65.0

si:CommonEquityTierOneCapitalRequiredforCapitalAdequacyToRiskWeightedAssets us-gaap:ConsolidatedEntities

si:CommonEquityTierOneCapitalRequiredforCapitalAdequacyToRiskWeightedAssets

srt:ParentCompany


Common
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value4.54.50.0450.0450.0450.0450.045
Percentage of CommonEquityTierOneCapitalRequiredforCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Common
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value4.54.50.0450.0450.0450.0450.045
Percentage of CommonEquityTierOneCapitalRequiredforCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0

si:CommonEquityTierOneCapitalRequiredtobeWellCapitalizedToRiskWeightedAssets us-gaap:ConsolidatedEntities

si:CommonEquityTierOneCapitalRequiredtobeWellCapitalizedToRiskWeightedAssets

srt:Subsidiaries


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value6.56.56.56.50.0650.0650.0650.0650.065
Percentage of CommonEquityTierOneCapitalRequiredtobeWellCapitalizedToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:DebtSecuritiesAvailableforsaleUnrealizedLossPositionDeclineInFairValuePercent

si:DebtSecuritiesAvailableforsaleUnrealizedLossPositionDeclineInFairValuePercent


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.730.580.861.740.03510.05130.01720.01260.0092
Percentage of DebtSecuritiesAvailableforsaleUnrealizedLossPositionDeclineInFairValuePercent100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:DebtSecuritiesIssuedInExcessOf10PercentOfShareholdersEquityFairValue

si:DebtSecuritiesIssuedInExcessOf10PercentOfShareholdersEquityFairValue


Debt
Period End2020-12-312020-09-30
Value118143
Percentage of DebtSecuritiesIssuedInExcessOf10PercentOfShareholdersEquityFairValue100.0100.0

si:DeferredTaxLiabilitiesDeferredLoanFees

si:DeferredTaxLiabilitiesDeferredLoanFees


Deferred
Period End2020-12-312019-12-312018-12-31
Value380000.0501000.0645000.0
Percentage of DeferredTaxLiabilitiesDeferredLoanFees100.0100.0100.0

si:DeferredTaxLiabilitiesFHLBStockDividends

si:DeferredTaxLiabilitiesFHLBStockDividends


Deferred
Period End2020-12-312019-12-312018-12-31
Value223000.0101000.0100000.0
Percentage of DeferredTaxLiabilitiesFHLBStockDividends100.0100.0100.0

si:DeferredTaxLiabilitiesInterestRateCapAndAvailableForSaleSecurities

si:DeferredTaxLiabilitiesInterestRateCapAndAvailableForSaleSecurities


Deferred
Period End2020-12-312019-12-312018-12-31
Value172.570.0
Percentage of DeferredTaxLiabilitiesInterestRateCapAndAvailableForSaleSecurities100.0100.00.0

si:DepositsOfTenLargestDepositors

si:DepositsOfTenLargestDepositors


Deposits
Period End2020-12-312019-12-31
Value2500523
Percentage of DepositsOfTenLargestDepositors100.0100.0

si:FinancingReceivableAllowanceForCreditLossToLoansRatio

si:FinancingReceivableAllowanceForCreditLossToLoansRatio


Financing
Period End2020-09-30
Value0.91
Percentage of FinancingReceivableAllowanceForCreditLossToLoansRatio100.0

si:FinancingReceivableBeforeAllowanceForCreditLossAfterDeferredFees

si:FinancingReceivableBeforeAllowanceForCreditLossAfterDeferredFees


Financing
Period End2021-03-312020-12-312019-12-31
Value735753670
Percentage of FinancingReceivableBeforeAllowanceForCreditLossAfterDeferredFees100.0100.0100.0

si:FinancingReceivableBeforeAllowanceForCreditLossAfterDeferredFees us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-03-312020-12-312019-12-31
Value973963405
Percentage of FinancingReceivableBeforeAllowanceForCreditLossAfterDeferredFees132.4127.960.4

si:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAfterDeferredFees

si:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAfterDeferredFees


Financing
Period End2021-06-302020-12-31
Value747753
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAfterDeferredFees100.0100.0

si:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAfterDeferredFees us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-06-302020-12-31
Value798963
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossAfterDeferredFees106.9127.9

si:FinancingReceivableModificationOtherThanTroubledDebtRestructuringRatioToGrossLoansHeldForInvestment us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName

si:FinancingReceivableModificationOtherThanTroubledDebtRestructuringRatioToGrossLoansHeldForInvestment

us-gaap:PaymentDeferral, si:COVID19RelatedModification


Financing
Period End2020-12-312020-09-30
Value19.119.0
Percentage of FinancingReceivableModificationOtherThanTroubledDebtRestructuringRatioToGrossLoansHeldForInvestment100.0100.0

si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringRatiotoGrossLoansHeldforInvestmentPercentageStillunderModification us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName

si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringRatiotoGrossLoansHeldforInvestmentPercentageStillunderModification

us-gaap:PaymentDeferral, si:COVID19RelatedModification


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value3.18.98.54.4
Percentage of FinancingReceivableModificationOtherthanTroubledDebtRestructuringRatiotoGrossLoansHeldforInvestmentPercentageStillunderModification100.0100.0100.0100.0

si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringStillunderModification us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName

si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringStillunderModification

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:PaymentDeferral, si:COVID19RelatedModification


Financing
Period End2021-03-31
Value40
Percentage of FinancingReceivableModificationOtherthanTroubledDebtRestructuringStillunderModification100.0

si:FinancingReceivableModificationOtherthanTroubledDebtRestructuringStillunderModification us-gaap:LoanRestructuringModification, us-gaap:LoanRestructuringModificationName

us-gaap:PaymentDeferral, si:COVID19RelatedModification


Financing
Period End2021-06-302021-03-312020-12-312020-09-30
Value23656332
Percentage of FinancingReceivableModificationOtherthanTroubledDebtRestructuringStillunderModification0.0163.20.00.0

si:FinancingReceivableRelatedParties

si:FinancingReceivableRelatedParties


Financing
Period End2021-06-302021-03-312020-12-312019-12-31
Value5000000.05500000.05000000.04600000.0
Percentage of FinancingReceivableRelatedParties100.0100.0100.0100.0

si:InterestBearingDomesticDepositMoneyMarketAndSavings

si:InterestBearingDomesticDepositMoneyMarketAndSavings


Interest
Period End2020-12-312019-12-312018-12-31
Value718577
Percentage of InterestBearingDomesticDepositMoneyMarketAndSavings100.0100.0100.0

si:InterestPayableFairValueDisclosure

si:InterestPayableFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value246000.0107000.0260000.0120000.0322000.0215000.0559000.0446000.0451000.0
Percentage of InterestPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:InterestPayableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value246000.0107000.0260000.0120000.0322000.0215000.0559000.0446000.0451000.0
Percentage of InterestPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:InterestReceivableFairValueDisclosure

si:InterestReceivableFairValueDisclosure


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value249.4328.6987.3857.76.3445.955.8755.77
Percentage of InterestReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

si:InterestReceivableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.2480.1190.0080.0070.0030.0030.0860.0450.571
Percentage of InterestReceivableFairValueDisclosure1.01.30.10.10.00.01.40.89.9

us-gaap:FairValueInputsLevel2


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7.5462.7972.632.1432.0633.483.6432.2471.43
Percentage of InterestReceivableFairValueDisclosure30.829.730.229.026.854.961.238.224.8

us-gaap:FairValueInputsLevel3


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value166.5166.065.2355.6342.8612.2213.5833.769
Percentage of InterestReceivableFairValueDisclosure68.269.169.770.973.245.137.361.065.3

si:LoansAndLeasesReceivableAccruedInterest

si:LoansAndLeasesReceivableAccruedInterest


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2700000.02600000.02300000.02200000.02400000.02100000.0
Percentage of LoansAndLeasesReceivableAccruedInterest100.0100.0100.0100.0100.0100.0

si:LoansHeldForInvestmentMeasurementInput us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType

si:LoansHeldForInvestmentMeasurementInput

us-gaap:FairValueInputsLevel3, si:CollateralDependentImpairedLoans, us-gaap:MeasurementInputCostToSell


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value8.08.08.00.080.08
Percentage of LoansHeldForInvestmentMeasurementInput100.0100.0100.0100.0100.0

si:LoansHeldForInvestmentMeasurementInput us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

us-gaap:FairValueInputsLevel3, si:CollateralDependentImpairedLoans, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value10.010.010.00.10.1
Percentage of LoansHeldForInvestmentMeasurementInput125.0125.0125.0125.0125.0

si:LoansHeldForInvestmentMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, si:CollateralDependentImpairedLoans, us-gaap:MeasurementInputCostToSell


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value8.08.08.00.080.08
Percentage of LoansHeldForInvestmentMeasurementInput100.0100.0100.0100.0100.0

si:LoansHeldForInvestmentMeasurementInput us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique

srt:WeightedAverage, us-gaap:FairValueInputsLevel3, si:CollateralDependentImpairedLoans, us-gaap:MeasurementInputDiscountForLackOfMarketability, us-gaap:MarketApproachValuationTechnique


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value10.010.010.00.10.1
Percentage of LoansHeldForInvestmentMeasurementInput125.0125.0125.0125.0125.0

si:LowIncomeHousingTaxCreditInvestment

si:LowIncomeHousingTaxCreditInvestment


Low
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value900000.0890000.0917000.0927000.0954000.0981000.01044000.0
Percentage of LowIncomeHousingTaxCreditInvestment100.0100.0100.0100.0100.0100.0100.0

si:OtherRealEstateOwnedFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

si:OtherRealEstateOwnedFairValueDisclosure

us-gaap:FairValueInputsLevel3


Other
Period End2020-09-30
Value27000.0
Percentage of OtherRealEstateOwnedFairValueDisclosure100.0

si:ProportionOfTotalDepositsOfDepositsFromDigitalCurrencyExchangesPercent

si:ProportionOfTotalDepositsOfDepositsFromDigitalCurrencyExchangesPercent


Proportion
Period End2020-12-312019-12-31
Value47.229.1
Percentage of ProportionOfTotalDepositsOfDepositsFromDigitalCurrencyExchangesPercent100.0100.0

si:ProportionOfTotalDepositsOfTenLargestDepositorsPercent

si:ProportionOfTotalDepositsOfTenLargestDepositorsPercent


Proportion
Period End2020-12-312019-12-31
Value47.528.9
Percentage of ProportionOfTotalDepositsOfTenLargestDepositorsPercent100.0100.0

us-gaap:AccruedLiabilitiesAndOtherLiabilities

us-gaap:AccruedLiabilitiesAndOtherLiabilities


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3125282621129.026139.408
Percentage of AccruedLiabilitiesAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesAndOtherLiabilities us-gaap:ConsolidatedEntities

srt:ParentCompany


Accrued
Period End2020-12-312019-12-312018-12-31
Value0.8371.2632.226
Percentage of AccruedLiabilitiesAndOtherLiabilities3.014.023.7

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

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value261.990.00.00.00.00.0
Percentage of AssetsFairValueDisclosure100.0100.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value62161751970978986997921940358
Percentage of AssetsFairValueDisclosure23024.888033.20.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2020-09-302020-06-302019-12-312019-09-302018-12-31
Value0.3440.3620.4920.4450.434
Percentage of AssetsFairValueDisclosure0.00.00.00.00.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Assets
Period End2020-09-302020-06-302019-12-312019-09-302018-12-31
Value0.3440.3620.4920.4450.434
Percentage of AssetsFairValueDisclosure0.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value62431753970978986997921940358
Percentage of AssetsFairValueDisclosure23124.888133.20.00.00.00.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47314439341913180.314
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Available
Period End2021-06-302018-12-31
Value0.1590.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.30.0

si:GovernmentGuaranteedCollateralResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.8750.1940.3710.4720.5230.7090.5520.5390.037
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax1.80.60.81.21.53.74.13.011.8

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Available
Period End2021-06-302021-03-31
Value0.430.002
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.90.0

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1210181815101216
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax27.532.841.646.645.557.393.093.7

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.0230.530.3990.440.3130.00.3520.5670.064
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.01.70.91.10.90.02.63.120.4

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Available
Period End2021-06-30
Value4.21
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax8.9

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.4020.2980.0170.00.00.00.00.188
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.80.90.00.00.00.00.059.9

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.180.1670.0180.0170.0160.0340.0320.0330.025
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.40.50.00.00.00.20.20.28.0

us-gaap:NontaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value2618241917
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax55.158.855.048.850.9

us-gaap:TaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1.9011.4850.6950.8650.402
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax4.04.61.62.21.2

us-gaap:USTreasurySecurities


Available
Period End2021-06-30
Value0.059
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.1

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value245.1513.7587.88216237.7035.4822.811
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Available
Period End2021-06-302021-03-312018-12-31
Value0.1680.0351.065
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.70.737.9

si:GovernmentGuaranteedCollateralResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7.2252.8440.2980.2780.3110.8630.8370.9050.625
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax29.055.27.93.51.93.610.916.522.2

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Available
Period End2021-06-302021-03-31
Value1.3060.024
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax5.20.5

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Available
Period End2021-06-302020-06-302020-03-312019-12-312019-09-30
Value0.4230.00.8060.1770.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax1.70.03.42.30.0

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.0220.170.2560.3953.453.4620.1980.2110.107
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.13.36.85.020.914.52.63.83.8

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Available
Period End2021-06-30
Value3.448
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax13.8

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.5430.8153.1497.20812186.4914.3661.014
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2.215.883.891.477.278.584.379.636.1

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7.9211.2020.0550.0010.0010.00.00.00.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax31.823.31.50.00.00.00.00.00.0

us-gaap:NontaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-06-30
Value2.0640.0130.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax8.30.30.0

us-gaap:TaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-06-30
Value1.7030.0480.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax6.80.90.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-30
Value0.118
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.5

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value61541690898912933969892897359
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Available
Period End2021-06-302021-03-312018-12-31
Value1924223
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.12.56.6

si:GovernmentGuaranteedCollateralResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value162068619721222723624224650
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis26.340.622.023.224.424.427.227.514.1

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Available
Period End2021-06-302021-03-31
Value29149
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis4.72.9

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value233163164164164364364363
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.89.718.318.017.637.640.940.5

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1.7211820212225262723
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.01.12.32.32.52.73.03.16.7

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Available
Period End2021-06-30
Value578
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis9.4

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value241245248251253256258258260
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis3.914.527.727.627.226.528.928.872.3

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value13271525.7010.6650.6740.6820.7690.7830.932
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis21.69.00.60.10.10.10.10.10.3

us-gaap:NontaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value979318246246247
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis15.918.827.427.026.5

us-gaap:TaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value35614151515
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis5.80.81.71.71.7

us-gaap:USTreasurySecurities


Available
Period End2021-06-30
Value331
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis5.4

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost


Available
Period End2020-12-312019-12-31
Value140.411
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue


Available
Period End2020-12-312019-12-31
Value150.408
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost


Available
Period End2020-12-312019-12-31
Value884891
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue


Available
Period End2020-12-312019-12-31
Value923897
Percentage of AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-31
Value53181634884
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue


Available
Period End2021-06-302021-03-312020-12-31
Value53401660923
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-31
Value8325614
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue


Available
Period End2021-06-302021-03-312020-12-31
Value8335715
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis


Available
Period End2021-06-30
Value3032000.0
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue


Available
Period End2021-06-30
Value2951000.0
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate


Available
Period End2021-06-302021-03-312020-12-312019-12-31
Value61761717939897
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312019-12-31
Value61541690898892
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value61761717939944951964897909357
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value61761717939944951964897909357
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value61761717939944951964897909357
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Available
Period End2021-06-302021-03-312018-12-31
Value1924222
Percentage of AvailableForSaleSecuritiesDebtSecurities3.12.56.4

si:GovernmentGuaranteedCollateralResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value161368319821222723624124650
Percentage of AvailableForSaleSecuritiesDebtSecurities26.139.821.122.524.024.526.927.114.1

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Available
Period End2021-06-302021-03-31
Value29049
Percentage of AvailableForSaleSecuritiesDebtSecurities4.72.9

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value245174182182180374377380
Percentage of AvailableForSaleSecuritiesDebtSecurities4.010.219.419.419.038.942.041.8

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1.7221920211922262723
Percentage of AvailableForSaleSecuritiesDebtSecurities0.01.12.22.22.12.33.03.06.7

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Available
Period End2021-06-30
Value579
Percentage of AvailableForSaleSecuritiesDebtSecurities9.4

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value241245245244241237251254259
Percentage of AvailableForSaleSecuritiesDebtSecurities3.914.326.225.925.424.728.027.972.6

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value13191515.6640.6810.6890.7160.8010.8160.957
Percentage of AvailableForSaleSecuritiesDebtSecurities21.48.80.60.10.10.10.10.10.3

us-gaap:NontaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1003336270266265
Percentage of AvailableForSaleSecuritiesDebtSecurities16.319.628.828.227.9

us-gaap:TaxableMunicipalBonds


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value35615161616
Percentage of AvailableForSaleSecuritiesDebtSecurities5.80.91.71.71.7

us-gaap:USTreasurySecurities


Available
Period End2021-06-30
Value331
Percentage of AvailableForSaleSecuritiesDebtSecurities5.4

us-gaap:Capital us-gaap:ConsolidatedEntities

us-gaap:Capital

srt:ParentCompany


Capitalus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value871705270264257251246236215
Percentage of Capital100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capitalus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value865692268251243236230226204
Percentage of Capital99.398.199.395.194.594.293.795.994.6

us-gaap:CapitalRequiredForCapitalAdequacy us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredForCapitalAdequacy

srt:ParentCompany


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value14510392858077737266
Percentage of CapitalRequiredForCapitalAdequacy100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value14510292858077737266
Percentage of CapitalRequiredForCapitalAdequacy100.099.9100.0100.099.999.999.899.699.5

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredForCapitalAdequacyToRiskWeightedAssets

srt:ParentCompany


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value8.08.08.08.00.080.080.080.080.08
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value8.08.08.08.00.080.080.080.080.08
Percentage of CapitalRequiredForCapitalAdequacyToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalRequiredToBeWellCapitalized us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredToBeWellCapitalized

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value18112811510710096919083
Percentage of CapitalRequiredToBeWellCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets us-gaap:ConsolidatedEntities

us-gaap:CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

srt:Subsidiaries


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value10.010.010.010.00.10.10.10.10.1
Percentage of CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CapitalizedComputerSoftwareNet


Capitalized
Period End2020-12-312019-12-31
Value2400000.02000000.0
Percentage of CapitalizedComputerSoftwareNet100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:CashAndCashEquivalentsFairValueDisclosure


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value52161615132.7781.5794.0984.177
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents

us-gaap:InterestBearingDeposits


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value441543152945182185163132156670
Percentage of CashAndCashEquivalentsFairValueDisclosure8353.326276.317956.01203.31347.75882.78361.33810.616046.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:InterestBearingDeposits, us-gaap:FairValueInputsLevel1


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value441543152945182185163132156670
Percentage of CashAndCashEquivalentsFairValueDisclosure8353.326276.317956.01203.31347.75882.78361.33810.616046.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value52161615132.7781.5794.0984.177
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndDueFromBanks

us-gaap:CashAndDueFromBanks


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value52161615132.7781.5794.0984.177
Percentage of CashAndDueFromBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndDueFromBanks us-gaap:ConsolidatedEntities

srt:ParentCompany


Cash
Period End2020-12-312019-12-312018-12-31
Value1.9911915
Percentage of CashAndDueFromBanks12.11208.7367.6

us-gaap:CommonEquityTierOneCapital us-gaap:ConsolidatedEntities

us-gaap:CommonEquityTierOneCapital

srt:ParentCompany


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value849683248242234229224214193
Percentage of CommonEquityTierOneCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value858685261244236230224220197
Percentage of CommonEquityTierOneCapital101.1100.3105.4101.0100.6100.4100.0102.7102.0

us-gaap:CommonEquityTierOneCapitalRatio us-gaap:ConsolidatedEntities

us-gaap:CommonEquityTierOneCapitalRatio

srt:ParentCompany


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value46.7553.0321.5322.580.23320.23750.24520.23570.231
Percentage of CommonEquityTierOneCapitalRatio100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value47.2953.2422.7122.820.23480.23860.24550.2430.2368
Percentage of CommonEquityTierOneCapitalRatio101.2100.4105.5101.1100.7100.5100.1103.1102.5

us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy us-gaap:ConsolidatedEntities

us-gaap:CommonEquityTierOneCapitalRequiredForCapitalAdequacy

srt:ParentCompany


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value815751484543414037
Percentage of CommonEquityTierOneCapitalRequiredForCapitalAdequacy100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Subsidiaries


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value815751484543414037
Percentage of CommonEquityTierOneCapitalRequiredForCapitalAdequacy100.099.9100.0100.099.999.999.899.699.5

us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized us-gaap:ConsolidatedEntities

us-gaap:CommonEquityTierOneCapitalRequiredToBeWellCapitalized

srt:Subsidiaries


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1188374696562595854
Percentage of CommonEquityTierOneCapitalRequiredToBeWellCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCollateralAmount us-gaap:ShortTermDebtType

us-gaap:DebtInstrumentCollateralAmount

us-gaap:FederalReserveBankAdvances


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value6.26.26.36.46.47.6101019
Percentage of DebtInstrumentCollateralAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage si:Organization, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

si:TrustOne, si:A2001SubordinatedDebenturesMaturingJuly252031, us-gaap:SubordinatedDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.983.984.064.060.05510.05510.05940.0594
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage si:Organization, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:VariableRate

si:TrustTwo, si:A2005SubordinatedDebenturesMaturingMarch152035, us-gaap:SubordinatedDebt, us-gaap:LondonInterbankOfferedRateLIBOR


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1.972.032.072.10.02160.02590.03740.0397
Percentage of DebtInstrumentInterestRateEffectivePercentage49.551.051.051.739.247.063.066.8

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:SubordinatedDebt


Debt
Period End2021-06-302021-03-312020-12-312019-12-31
Value100000.0100000.0100000.0200000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value21718130731431223121913653
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value149525659621529
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger69.128.818.518.820.07.254.6

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Debt
Period End2021-06-302020-03-312019-12-31
Value7.8390.00.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger3.60.00.0

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.6998.6099.95108.8915
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger0.34.73.23.32.86.9

us-gaap:AssetBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value581202402442412151881090.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger27.066.578.377.977.192.885.980.10.0

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2021-06-302020-06-302019-12-31
Value0.0720.015
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger0.00.07.2

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.9131.053.5247.71116195.4232.2421.659
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value0.3050.1450.1260.1220.1370.0520.567
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss33.413.83.61.60.81.034.2

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Debt
Period End2021-06-302020-03-312019-12-31
Value0.1280.00.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss14.00.00.0

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.0220.170.2490.3813.4070.197
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss2.416.27.14.920.93.6

us-gaap:AssetBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.4580.7353.1497.20812165.1741.9780.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss50.270.089.493.578.284.995.488.20.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3166703126130141209219294248
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Debt
Period End2021-06-302021-03-312018-12-31
Value124300.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months3.94.40.0

si:GovernmentGuaranteedCollateralResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value8344781201291391439.952
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months26.368.095.799.398.565.44.0

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Debt
Period End2021-06-302021-03-31
Value15918
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months5.02.6

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Debt
Period End2021-06-302020-03-312019-12-31
Value354113
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months1.119.96.0

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Debt
Period End2020-12-312020-09-302020-06-302019-12-31
Value0.290.7521.7440.059
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months0.20.61.20.0

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Debt
Period End2021-06-30
Value150
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months4.8

us-gaap:AssetBackedSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value63440.02262145219
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months2.06.30.010.828.649.288.3

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value11401025.1650.1770.409143
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months36.014.64.10.10.365.4

us-gaap:NontaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value32523
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months10.33.4

us-gaap:TaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value2225.767
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months7.00.8

us-gaap:USTreasurySecurities


Debt
Period End2021-06-30
Value109
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months3.5

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value244.1010.2340.1710.2183.8792.283.241.152
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Debt
Period End2021-06-302021-03-312018-12-31
Value0.1680.0350.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.70.90.0

si:GovernmentGuaranteedCollateralResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value6.922.6990.1720.1560.1740.7850.058
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss28.865.873.591.279.834.45.0

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Debt
Period End2021-06-302021-03-31
Value1.3060.024
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss5.40.6

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Debt
Period End2021-06-302020-03-312019-12-31
Value0.2950.8060.177
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss1.220.87.8

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Debt
Period End2020-12-312020-09-302020-06-302019-12-31
Value0.0070.0140.0430.001
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss3.08.219.70.0

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Debt
Period End2021-06-30
Value3.448
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss14.3

us-gaap:AssetBackedSecurities


Debt
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.0850.080.01.7721.3172.3881.014
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.42.00.045.757.873.788.0

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value7.9211.2020.0550.0010.0010.785
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss33.029.323.50.60.534.4

us-gaap:NontaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value2.0640.013
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss8.60.3

us-gaap:TaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value1.7030.048
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss7.11.2

us-gaap:USTreasurySecurities


Debt
Period End2021-06-30
Value0.118
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.5

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3383885434444454440439431302
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Debt
Period End2021-06-302021-03-312018-12-31
Value1243022
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition3.73.57.5

si:GovernmentGuaranteedCollateralResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value98453017718820115939
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition29.159.941.042.444.436.313.0

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Debt
Period End2021-06-302021-03-31
Value15918
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition4.72.1

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Debt
Period End2021-06-302020-03-312019-12-31
Value434113
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition1.39.53.0

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.6998.60910111015
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition0.01.02.42.52.33.5

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Debt
Period End2021-06-30
Value150
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition4.5

us-gaap:AssetBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value121164240244241237251254219
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition3.618.655.555.053.153.957.359.072.6

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value11401025.1650.1770.409159
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition33.711.61.20.00.136.3

us-gaap:NontaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value32523
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition9.62.7

us-gaap:TaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value2225.767
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition6.60.7

us-gaap:USTreasurySecurities


Debt
Period End2021-06-30
Value109
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition3.2

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value245.1513.7587.88216237.7035.4822.811
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss us-gaap:FinancialInstrument

si:GovernmentGuaranteedCollateralCommercial


Debt
Period End2021-06-302021-03-312018-12-31
Value0.1680.0351.065
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.70.737.9

si:GovernmentGuaranteedCollateralResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312018-12-31
Value7.2252.8440.2980.2780.3110.8370.625
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss29.055.27.93.51.910.922.2

si:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesCommercial


Debt
Period End2021-06-302021-03-31
Value1.3060.024
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss5.20.5

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesCommercial


Debt
Period End2021-06-302020-03-312019-12-31
Value0.4230.8060.177
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss1.73.42.3

si:MortgagebackedSecuritiesIssuedbyPrivateEnterprisesResidential


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.0220.170.2560.3953.450.198
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.13.36.85.020.92.6

si:USGovernmentAgenciesSecuritiesExcludingMortgageBackedSecurities


Debt
Period End2021-06-30
Value3.448
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss13.8

us-gaap:AssetBackedSecurities


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.5430.8153.1497.20812186.4914.3661.014
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss2.215.883.891.477.278.584.379.636.1

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value7.9211.2020.0550.0010.0010.837
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss31.823.31.50.00.010.9

us-gaap:NontaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value2.0640.013
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss8.30.3

us-gaap:TaxableMunicipalBonds


Debt
Period End2021-06-302021-03-31
Value1.7030.048
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss6.80.9

us-gaap:USTreasurySecurities


Debt
Period End2021-06-30
Value0.118
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.5

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value195.4931.234
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDeferredIncome


Deferred
Period End2020-12-312019-12-312018-12-31
Value74000.0149000.098000.0
Percentage of DeferredTaxAssetsDeferredIncome100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-31
Value4340000.05069000.04563000.0
Percentage of DeferredTaxAssetsGross100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-31
Value205000.0356000.0269000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0

us-gaap:DeferredTaxAssetsStateTaxes

us-gaap:DeferredTaxAssetsStateTaxes


Deferred
Period End2020-12-312019-12-312018-12-31
Value423000.0633000.0552000.0
Percentage of DeferredTaxAssetsStateTaxes100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences


Deferred
Period End2020-12-312019-12-312018-12-31
Value448000.0368000.0333000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses


Deferred
Period End2020-12-312019-12-312018-12-31
Value301000.0394000.0333000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBonuses100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value948000.01397000.0232000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses


Deferred
Period End2020-12-312019-12-312018-12-31
Value1941000.01772000.01921000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-312019-12-312018-12-31
Value505000.01308000.00
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0100.00.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312019-12-312018-12-31
Value409000.0307000.0122000.0
Percentage of DeferredTaxLiabilitiesOther100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-31
Value271000.0706000.0367000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0

us-gaap:Deposits

us-gaap:Deposits


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1137170025248228116702002181418481783
Percentage of Deposits100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsFairValueDisclosure

us-gaap:DepositsFairValueDisclosure


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1140072695458239317692064182618591621
Percentage of DepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Deposits
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1140072695458239317692064182618591621
Percentage of DepositsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets

us-gaap:DerivativeAssets


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value39343134353323300.999
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value39343134353323300.999
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value39343134353323300.999
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeAsset

si:DerivativeAssets, us-gaap:InterestRateCap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-31
Value1510
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0

si:DerivativeAssets, us-gaap:InterestRateFloor, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-31
Value222230
Percentage of DerivativeFairValueOfDerivativeAsset146.3212.20.0

si:DerivativeAssets, us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-31
Value0.9231.410.338
Percentage of DerivativeFairValueOfDerivativeAsset5.913.30.0

us-gaap:DerivativeFairValueOfDerivativeAsset us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

si:DerivativeAssets, us-gaap:InterestRateCap, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-09-302020-06-302019-12-31
Value0.0010.0140.386
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.0

si:DerivativeAssets, us-gaap:InterestRateFloor, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value30343523
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.00.0

si:DerivativeAssets, us-gaap:InterestRateSwap, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312020-09-302020-06-302019-12-31
Value0.3380.060.0160.0
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.00.0

us-gaap:DerivativeFloorInterestRate us-gaap:DerivativeInstrumentRisk, us-gaap:VariableRate

us-gaap:DerivativeFloorInterestRate

us-gaap:InterestRateFloor, us-gaap:FederalFundsEffectiveSwapRate


Derivative
Period End2021-06-302021-03-312019-12-312019-09-30
Value2.52.50.0250.025
Percentage of DerivativeFloorInterestRate100.0100.0100.0100.0

us-gaap:InterestRateFloor, us-gaap:LondonInterbankOfferedRateLIBOR


Derivative
Period End2021-06-302021-03-312020-03-312019-12-312019-09-30
Value2.252.250.02250.02250.0225
Percentage of DerivativeFloorInterestRate90.090.00.090.090.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

us-gaap:InterestRateCap


Derivative
Period End2021-06-302021-03-31
Value552205
Percentage of DerivativeNotionalAmount100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3400000.03200000.0700000.0800000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1300000.01400000.0600000.0600000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value151515151514151515
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Fair
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value151515151514151515
Percentage of FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd

us-gaap:FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd


Federal
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value00.00230.00210.01660.02080
Percentage of FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd0.0100.0100.0100.0100.00.0

us-gaap:FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd

us-gaap:FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd


Federal
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3601253601152182015
Percentage of FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-03-312019-12-312019-09-302018-12-31
Value730866893734643554529472
Percentage of FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1

us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value120014001455130010001000875695625
Percentage of FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankAdvancesLongTerm

us-gaap:FederalHomeLoanBankAdvancesLongTerm


Federal
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value10.03603049200.0
Percentage of FederalHomeLoanBankAdvancesLongTerm100.0100.0100.0100.0100.00.0

us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate

us-gaap:FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate


Federal
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value10.036030490.0
Percentage of FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate100.0100.0100.0100.00.0

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure


Federal
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value10.0360304920
Percentage of FederalHomeLoanBankBorrowingsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankBorrowingsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Federal
Period End2020-09-302020-06-302020-03-312019-12-312019-09-30
Value10.0360304920
Percentage of FederalHomeLoanBankBorrowingsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock


Federal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value29141414131010109.66
Percentage of FederalHomeLoanBankStockAndFederalReserveBankStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss

us-gaap:FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss


Financing
Period End2021-06-302021-03-312020-12-312019-12-31
Value3100000.03100000.02700000.02200000.0
Percentage of FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest

us-gaap:FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value6916000.06916000.06916000.06763000.06558000.06191000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value1245000.0360000.01931000.0763000.0426000.0312000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest18.05.227.911.36.55.0

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value2938000.03251000.01810000.01947000.02957000.02791000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest42.547.026.228.845.145.1

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value512000.0493000.0590000.01018000.0258000.096000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest7.47.18.515.13.91.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value1259000.01634000.01245000.01514000.01971000.02051000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest18.223.618.022.430.133.1

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value743000.0828000.0878000.0822000.0689000.0653000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest10.712.012.712.210.510.5

us-gaap:FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value11000.018000.039000.040000.039000.038000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest0.20.30.60.60.60.6

us-gaap:FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value208000.0332000.0423000.0659000.0218000.0250000.0
Percentage of FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest3.04.86.19.73.34.0

us-gaap:FinancingReceivableAllowanceForCreditLosses

us-gaap:FinancingReceivableAllowanceForCreditLosses


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6916000.06916000.06763000.06763000.06558000.06191000.06191000.07049000.06990000.06723000.08388000.08326000.08165000.0
Percentage of FinancingReceivableAllowanceForCreditLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value360000.01931000.0777000.0763000.0426000.0312000.0312000.0237000.0256000.0156000.0
Percentage of FinancingReceivableAllowanceForCreditLosses5.227.911.511.36.55.05.03.43.72.3

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value3251000.01810000.01929000.01947000.02957000.02791000.02791000.03761000.03937000.03854000.04455000.04455000.04711000.0
Percentage of FinancingReceivableAllowanceForCreditLosses47.026.228.528.845.145.145.153.456.357.353.153.557.7

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value493000.0590000.01327000.01018000.0258000.096000.096000.079000.0108000.098000.0130000.0130000.0140000.0
Percentage of FinancingReceivableAllowanceForCreditLosses7.18.519.615.13.91.61.61.11.51.51.51.61.7

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1634000.01245000.01431000.01514000.01971000.02051000.02051000.01769000.01889000.01848000.01776000.01782000.01991000.0
Percentage of FinancingReceivableAllowanceForCreditLosses23.618.021.222.430.133.133.125.127.027.521.221.424.4

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value828000.0878000.0845000.0822000.0689000.0653000.0653000.0879000.0511000.0483000.0200000.0200000.0226000.0
Percentage of FinancingReceivableAllowanceForCreditLosses12.012.712.512.210.510.510.512.57.37.22.42.42.8

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value18000.039000.041000.039000.038000.037000.037000.036000.054000.054000.046000.046000.041000.0
Percentage of FinancingReceivableAllowanceForCreditLosses0.30.60.60.60.60.60.60.50.80.80.50.60.5

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value332000.0423000.0413000.0659000.0218000.0250000.0250000.0287000.0235000.0229000.0288000.0288000.0361000.0
Percentage of FinancingReceivableAllowanceForCreditLosses4.86.16.19.73.34.04.04.13.43.43.43.54.4

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value6905000.06897000.06876000.06724000.06724000.06518000.06152000.06152000.06676000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1245000.0360000.01931000.0777000.0763000.0312000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment18.05.228.111.611.35.1

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2938000.03251000.01810000.01929000.01947000.02957000.02791000.02791000.03854000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment42.547.126.328.729.045.445.445.457.7

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value512000.0493000.0590000.01327000.01018000.0258000.096000.096000.098000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment7.47.18.619.715.14.01.61.61.5

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1248000.01622000.01234000.01422000.01504000.01960000.02041000.02041000.01848000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment18.123.517.921.122.430.133.233.227.7

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value743000.0828000.0878000.0845000.0822000.0689000.0653000.0653000.0483000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment10.812.012.812.612.210.610.610.67.2

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value11000.011000.010000.011000.010000.09000.08000.08000.07000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment0.20.20.10.20.10.10.10.10.1

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value208000.0332000.0423000.0413000.0659000.0218000.0250000.0250000.0229000.0
Percentage of FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment3.04.86.26.19.83.34.14.13.4

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value11000.019000.040000.039000.039000.040000.039000.039000.047000.0
Percentage of FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value11000.012000.011000.09000.010000.011000.010000.010000.00
Percentage of FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1100.063.227.523.125.627.525.625.60.0

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1 us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7000.029000.030000.029000.029000.029000.029000.047000.0
Percentage of FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment136.872.576.974.472.574.474.4100.0

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value727717734724789674652678580
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value20411878242211
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment28.016.510.73.42.91.8

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value263277292306314323323315301
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment36.138.739.842.339.947.949.646.551.9

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.4815.1726.2721310107.2133.9863.847
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment0.80.70.91.91.41.51.10.60.7

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value136165182205212198189208187
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment18.823.124.828.426.929.429.030.732.3

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value677477727276817740
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment9.310.310.510.09.111.412.411.57.0

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.480.470.4640.4580.4520.5810.5670.5550.519
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment0.10.10.10.10.10.10.10.10.1

us-gaap:ConsumerPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.1625.5590.2430.1540.1220.0760.15
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment0.00.80.00.00.00.00.0

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value4976979415551396141
Percentage of FinancingReceivableCollectivelyEvaluatedForImpairment6.910.613.313.119.77.76.09.17.2

us-gaap:FinancingReceivableDeferredIncome

us-gaap:FinancingReceivableDeferredIncome


Financing
Period End2021-06-302021-03-312020-12-312019-12-31
Value1151000.01717000.02206000.02724000.0
Percentage of FinancingReceivableDeferredIncome100.0100.0100.0100.0

us-gaap:FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss

us-gaap:FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss


Financing
Period End2021-06-302020-12-31
Value740746
Percentage of FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss100.0100.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss


Financing
Period End2021-06-302020-12-31
Value745751
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss100.0100.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:Collateral

us-gaap:RealEstate


Financing
Period End2021-06-302020-12-31
Value491574
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss65.976.5

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302020-12-31
Value20478
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss27.410.5

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302020-12-31
Value272301
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss36.640.2

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Financing
Period End2021-06-302020-12-31
Value5.4816.272
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.70.8

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302020-12-31
Value144187
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss19.325.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2021-06-302020-12-31
Value6777
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss9.110.3

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value5.4816.272
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.70.8

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value136182
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss18.324.3

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancialAssetPastDue


Financing
Period End2021-06-302020-12-31
Value7.6094.897
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss1.00.7

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302020-12-31
Value2.2020.992
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.30.1

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302020-12-31
Value0.360.085
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.00.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-06-302020-12-31
Value5.0473.82
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.70.5

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value6576
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss8.810.2

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:FinancialAssetPastDue


Financing
Period End2021-06-302020-12-31
Value1.9840.206
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.30.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302020-12-31
Value1.9840.206
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.30.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value5.4816.272
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.70.8

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value136180
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss18.324.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:SpecialMention


Financing
Period End2021-06-302020-12-31
Value1.4153.284
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.20.4

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:Substandard


Financing
Period End2021-06-302020-12-31
Value6.6244.113
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.90.5

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value6777
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss9.110.3

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value20478
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss27.410.5

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value272301
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss36.640.2

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value20478
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss27.410.5

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302020-12-31
Value0.1990.274
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.00.0

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value250288
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss33.638.4

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:SpecialMention


Financing
Period End2021-06-302020-12-31
Value145.825
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss1.90.8

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302020-12-31
Value7.9867.767
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss1.11.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-06-302020-12-31
Value1.3641.495
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.20.2

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-06-302020-12-31
Value4997
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss6.713.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value4997
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss6.713.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value4997
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss6.713.0

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue

si:ReverseMortgagePortfolioSegment, us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value1.3641.495
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.20.2

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

si:ReverseMortgagePortfolioSegment, us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value0.480.626
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.10.1

si:ReverseMortgagePortfolioSegment, us-gaap:Substandard


Financing
Period End2021-06-302020-12-31
Value0.8840.869
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.10.1

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

si:SENLeverage


Financing
Period End2021-06-302020-12-31
Value20377
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss27.310.3

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancialAssetNotPastDue


Financing
Period End2021-06-302020-12-31
Value736746
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss98.799.3

us-gaap:FinancialAssetPastDue


Financing
Period End2021-06-302020-12-31
Value9.5935.103
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss1.30.7

us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-06-302020-12-31
Value4.1861.198
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.60.2

us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-06-302020-12-31
Value0.360.085
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.00.0

us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-06-302020-12-31
Value5.0473.82
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss0.70.5

us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss us-gaap:InternalCreditAssessment

us-gaap:Pass


Financing
Period End2021-06-302020-12-31
Value714729
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss95.897.1

us-gaap:SpecialMention


Financing
Period End2021-06-302020-12-31
Value159.109
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss2.11.2

us-gaap:Substandard


Financing
Period End2021-06-302020-12-31
Value1513
Percentage of FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss2.11.7

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value181616158.088.775151616
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.1990.2370.2741.2981.872.714
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment1.11.51.68.223.117.9

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9.9419.839.722101.9411.9417.3537.3857.946
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment54.261.158.465.024.022.148.644.449.3

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7.3025.1415.783.3563.4123.7324.2224.4253.342
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment39.832.034.721.342.242.527.926.620.7

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.8840.8760.8690.8640.8570.850.8481.0741.223
Percentage of FinancingReceivableIndividuallyEvaluatedForImpairment4.85.45.25.510.69.75.66.57.6

us-gaap:FinancingReceivableModificationsRecordedInvestment

us-gaap:FinancingReceivableModificationsRecordedInvestment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1400000.01500000.01500000.01600000.01600000.01700000.01800000.01800000.0500000.0
Percentage of FinancingReceivableModificationsRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentCurrent

us-gaap:FinancingReceivableRecordedInvestmentCurrent


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value725746733791674661692593
Percentage of FinancingReceivableRecordedInvestmentCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentCurrent us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value11878252414
Percentage of FinancingReceivableRecordedInvestmentCurrent16.310.63.53.12.2

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value287301316316325331322309
Percentage of FinancingReceivableRecordedInvestmentCurrent39.640.443.240.048.250.146.652.1

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.1726.2721310107.2133.9863.847
Percentage of FinancingReceivableRecordedInvestmentCurrent0.70.81.91.41.51.10.60.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value163182202210193186209187
Percentage of FinancingReceivableRecordedInvestmentCurrent22.524.527.626.628.628.230.331.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7476727276817740
Percentage of FinancingReceivableRecordedInvestmentCurrent10.210.39.99.111.412.311.36.8

us-gaap:FinancingReceivableRecordedInvestmentCurrent us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1.3461.3331.3221.3091.4311.4151.6291.742
Percentage of FinancingReceivableRecordedInvestmentCurrent0.20.20.20.20.20.20.20.3

us-gaap:ConsumerPortfolioSegment


Financing
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.1625.5590.2430.1540.1220.0760.15
Percentage of FinancingReceivableRecordedInvestmentCurrent0.00.80.00.00.00.00.0

us-gaap:FinancingReceivableRecordedInvestmentCurrent us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value76979415551396141
Percentage of FinancingReceivableRecordedInvestmentCurrent10.513.112.919.67.75.98.97.0

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7508000.05333000.04982000.04107000.04528000.05126000.05909000.06707000.08303000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Financing
Period End2020-09-302020-06-302019-12-31
Value123000.0498000.01098000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus3.011.018.6

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value6624000.04457000.04113000.03120000.03174000.03478000.03963000.04161000.03062000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus88.283.682.676.070.167.967.162.036.9

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Financing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value884000.0876000.0869000.0864000.0856000.0850000.0848000.01073000.01223000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus11.816.417.421.018.916.614.416.014.7

us-gaap:FinancingReceivableRecordedInvestmentPastDue

us-gaap:FinancingReceivableRecordedInvestmentPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7794000.05103000.06628000.05624000.09205000.06971000.02770000.03040000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7794000.04897000.06628000.05624000.09205000.06971000.02770000.03040000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue100.096.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Financing
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value206000.000000
Percentage of FinancingReceivableRecordedInvestmentPastDue4.00.00.00.00.00.0

us-gaap:FinancingReceivableRecordedInvestmentPastDue us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2773000.0992000.03417000.02639000.03587000.03573000.000
Percentage of FinancingReceivableRecordedInvestmentPastDue35.619.451.646.939.051.30.00.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2187000.085000.01851000.01462000.02804000.096000.076000.049000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue28.11.727.926.030.51.42.71.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2834000.03820000.01360000.01523000.02814000.03302000.02694000.02991000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue36.474.920.527.130.647.497.398.4

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302018-12-31
Value206000.000000
Percentage of FinancingReceivableRecordedInvestmentPastDue4.00.00.00.00.00.0

us-gaap:FinancingReceivableRecordedInvestmentPastDue us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivables30To59DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2773000.01198000.03417000.02639000.03587000.03573000.000
Percentage of FinancingReceivableRecordedInvestmentPastDue35.623.551.646.939.051.30.00.0

us-gaap:FinancingReceivables60To89DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2187000.085000.01851000.01462000.02804000.096000.076000.049000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue28.11.727.926.030.51.42.71.6

us-gaap:FinancingReceivablesEqualToGreaterThan90DaysPastDue


Financing
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2834000.03820000.01360000.01523000.02814000.03302000.02694000.02991000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue36.474.920.527.130.647.497.398.4

us-gaap:HedgedAssetFairValueHedge us-gaap:FairValueByAssetClass

us-gaap:HedgedAssetFairValueHedge

us-gaap:AvailableforsaleSecurities


Hedged
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value6962041515150.0
Percentage of HedgedAssetFairValueHedge100.0100.0100.0100.0100.00.0

us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease us-gaap:FairValueByAssetClass

us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease

us-gaap:AvailableforsaleSecurities


Hedged
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value-923000.0-2153000.0-278000.0-86000.026000.00
Percentage of HedgedAssetFairValueHedgeCumulativeIncreaseDecrease100.0100.0100.0100.0100.00.0

us-gaap:ImpairedFinancingReceivableRecordedInvestment

us-gaap:ImpairedFinancingReceivableRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value181616158.088.775151616
Percentage of ImpairedFinancingReceivableRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableRelatedAllowance

us-gaap:ImpairedFinancingReceivableRelatedAllowance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value11000.019000.040000.038000.039000.040000.039000.039000.047000.0
Percentage of ImpairedFinancingReceivableRelatedAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value11000.012000.011000.09000.010000.011000.010000.010000.00
Percentage of ImpairedFinancingReceivableRelatedAllowance100.063.227.523.725.627.525.625.60.0

us-gaap:ImpairedFinancingReceivableRelatedAllowance us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7000.029000.029000.029000.029000.029000.029000.047000.0
Percentage of ImpairedFinancingReceivableRelatedAllowance36.872.576.374.472.574.474.4100.0

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value191617169.0249.656161717
Percentage of ImpairedFinancingReceivableUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value181516157.6758.37141615
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.1990.2370.2741.2981.872.714
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment1.11.51.78.524.418.4

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9.9419.839.722101.9411.9417.3537.3857.946
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment54.461.759.966.725.323.249.945.550.8

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7.2395.0775.7163.2923.3473.6664.1564.3593.318
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment39.631.835.221.443.643.828.226.821.2

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.8840.80.5230.5180.5170.5110.5110.7370.797
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment4.85.03.23.46.76.13.54.55.1

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value181616168.6199.251151716
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value0.1990.2370.2741.5542.1172.929
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance1.01.41.69.524.618.5

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9.9419.839.723101.9411.9417.6327.6648.266
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance52.459.257.462.722.521.048.144.449.8

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7.9585.7426.4324.0144.0444.3154.7924.9173.739
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance41.934.637.924.646.946.630.228.522.5

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.8840.8010.5230.5180.5170.5110.510.7360.846
Percentage of ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance4.74.83.13.26.05.53.24.35.1

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value63000.0140000.0410000.0410000.0405000.0405000.0403000.0403000.0450000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value63000.064000.064000.064000.065000.066000.066000.066000.024000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment100.045.715.615.616.016.316.416.45.3

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value76000.0346000.0346000.0340000.0339000.0337000.0337000.0426000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment54.384.484.484.083.783.683.694.7

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value63000.0140000.0410000.0410000.0405000.0405000.0403000.0403000.0478000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value63000.064000.064000.064000.065000.066000.066000.066000.024000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance100.045.715.615.616.016.316.416.45.0

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Impaired
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value76000.0346000.0346000.0340000.0339000.0337000.0337000.0454000.0
Percentage of ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance54.384.484.484.083.783.683.695.0

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositLiabilities


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value80113114116107257470453152
Percentage of InterestBearingDepositLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestBearingDepositLiabilitiesDomestic

us-gaap:InterestBearingDepositLiabilitiesDomestic


Interest
Period End2020-12-312019-12-312018-12-31
Value114470152
Percentage of InterestBearingDepositLiabilitiesDomestic100.0100.0100.0

us-gaap:InterestBearingDepositsInBanks

us-gaap:InterestBearingDepositsInBanks


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value441543152945182185163132156670
Percentage of InterestBearingDepositsInBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestBearingDomesticDepositCertificatesOfDeposits

us-gaap:InterestBearingDomesticDepositCertificatesOfDeposits


Interest
Period End2020-12-312019-12-312018-12-31
Value0.84432429
Percentage of InterestBearingDomesticDepositCertificatesOfDeposits100.0100.0100.0

us-gaap:InterestBearingDomesticDepositDemand

us-gaap:InterestBearingDomesticDepositDemand


Interest
Period End2020-12-312019-12-312018-12-31
Value426045
Percentage of InterestBearingDomesticDepositDemand100.0100.0100.0

us-gaap:InterestPayableCurrentAndNoncurrent

us-gaap:InterestPayableCurrentAndNoncurrent


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value246000.0107000.0260000.0120000.0322000.0215000.0559000.0446000.0451000.0
Percentage of InterestPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestReceivable

us-gaap:InterestReceivable


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value249.4328.6987.3857.76.3445.955.8755.77
Percentage of InterestReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-31
Value1748000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity us-gaap:ShortTermDebtType

us-gaap:LineOfCreditFacilityCurrentBorrowingCapacity

us-gaap:FederalReserveBankAdvances


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value5000000.05100000.04800000.04600000.0
Percentage of LineOfCreditFacilityCurrentBorrowingCapacity100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableAllowance

us-gaap:LoansAndLeasesReceivableAllowance


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value6763000.06763000.06558000.06191000.06191000.06723000.0
Percentage of LoansAndLeasesReceivableAllowance100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableDeferredIncome

us-gaap:LoansAndLeasesReceivableDeferredIncome


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value2843000.03062000.02760000.02724000.02997000.02469000.0
Percentage of LoansAndLeasesReceivableDeferredIncome100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value742800685670698599
Percentage of LoansAndLeasesReceivableGrossCarryingAmount100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount us-gaap:Collateral

us-gaap:RealEstate


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value613617615614618546
Percentage of LoansAndLeasesReceivableGrossCarryingAmount82.677.189.791.688.691.2

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value760477486405368252
Percentage of LoansAndLeasesReceivableGrossCarryingAmount102.459.670.960.452.842.1

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

si:SENLeverage


Loans
Period End2020-09-302020-06-30
Value2220
Percentage of LoansAndLeasesReceivableGrossCarryingAmount3.02.5

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value739797683668695597
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Loans
Period End2020-09-302020-06-302019-12-31
Value252414
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome3.53.12.2

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value316316325331322309
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome42.839.747.649.646.451.9

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1310107.2133.9863.847
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.91.41.51.10.60.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value209216202193212190
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome28.327.129.628.930.632.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value727276817740
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome9.89.011.212.211.26.8

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1310107.2133.9863.847
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.91.41.51.10.60.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value205212198189208187
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome27.826.729.128.430.031.5

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:Substandard


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value3.123.1743.4783.9624.163.062
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.40.40.50.60.60.5

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value727276817740
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome9.89.011.212.211.26.8

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, us-gaap:Pass


Loans
Period End2020-09-302020-06-302019-12-31
Value242211
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome3.32.91.8

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment, us-gaap:Substandard


Loans
Period End2020-09-302020-06-302019-12-31
Value1.2981.872.714
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.20.20.4

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value302309316322322309
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome40.938.846.348.346.451.8

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:SpecialMention


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.8237.4578.5218.3810.00.0
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.80.91.21.30.00.0

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:Substandard


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value8.3080.00.00.00.00.422
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.10.00.00.00.00.1

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment

si:ReverseMortgagePortfolioSegment


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1.3221.3091.4311.4151.6291.742
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.20.20.20.20.20.3

us-gaap:ConsumerPortfolioSegment


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.5590.2430.1540.1220.0760.15
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.80.00.00.00.00.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9415551396141
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome12.819.57.65.98.97.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value9415551396141
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome12.819.57.65.98.97.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment

si:ReverseMortgagePortfolioSegment, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.4580.4530.4440.4350.3760.214
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.10.10.10.10.10.0

si:ReverseMortgagePortfolioSegment, us-gaap:Substandard


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.8640.8560.850.8481.0741.223
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.10.10.10.10.20.2

us-gaap:ConsumerPortfolioSegment, us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.5590.2430.1540.1220.0760.15
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.80.00.00.00.00.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome us-gaap:InternalCreditAssessment

us-gaap:Pass


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value720783667652685588
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome97.498.397.897.698.798.5

us-gaap:SpecialMention


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.8237.4578.6588.5130.3220.665
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome0.80.91.31.30.00.1

us-gaap:Substandard


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value135.96.587.5248.9978.303
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome1.80.71.01.11.31.4

us-gaap:LoansAndLeasesReceivableNetReportedAmount

us-gaap:LoansAndLeasesReceivableNetReportedAmount


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value735793679664691592
Percentage of LoansAndLeasesReceivableNetReportedAmount100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableRelatedParties

us-gaap:LoansAndLeasesReceivableRelatedParties


Loans
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value4900000.04600000.04600000.04600000.04600000.05000000.0
Percentage of LoansAndLeasesReceivableRelatedParties100.0100.0100.0100.0100.0100.0

us-gaap:LoansHeldForSaleFairValueDisclosure

us-gaap:LoansHeldForSaleFairValueDisclosure


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value748897865665321435376311351
Percentage of LoansHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansHeldForSaleFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value748897865665321435376311351
Percentage of LoansHeldForSaleFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivableFairValueDisclosure

us-gaap:LoansReceivableFairValueDisclosure


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value741732751737795681666693591
Percentage of LoansReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel3


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value741732751737795681666693591
Percentage of LoansReceivableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, si:ReverseMortgagePortfolioSegment


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.0690.3170.3170.3110.310.3080.3080.379
Percentage of LoansReceivableFairValueDisclosure0.00.00.00.00.00.00.00.1

us-gaap:LoansReceivableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel3, si:CollateralDependentImpairedLoans


Loans
Period End2020-12-31
Value0.317
Percentage of LoansReceivableFairValueDisclosure0.0

us-gaap:LoansReceivableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FairValueInputsLevel3, si:ReverseMortgagePortfolioSegment


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-31
Value0.0690.3170.3170.3110.31
Percentage of LoansReceivableFairValueDisclosure0.00.00.00.00.0

us-gaap:LoansReceivableFairValueDisclosure us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FairValueMeasurementsNonrecurring, si:ReverseMortgagePortfolioSegment


Loans
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.0690.3170.3170.3110.310.3080.3080.379
Percentage of LoansReceivableFairValueDisclosure0.00.00.00.00.00.00.00.1

us-gaap:LoansReceivableHeldForSaleAmount

us-gaap:LoansReceivableHeldForSaleAmount


Loans
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value748897865665321435375311350
Percentage of LoansReceivableHeldForSaleAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivableHeldForSaleAmount us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ResidentialPortfolioSegment, si:MortgageWarehouse


Loans
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value866665321435365306211
Percentage of LoansReceivableHeldForSaleAmount100.0100.0100.0100.097.398.560.2

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners si:Organization, us-gaap:Ownership, us-gaap:LongtermDebtType

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners

si:TrustTwo, si:TrustTwo, us-gaap:SubordinatedDebt


Minority
Period End2020-12-31
Value3.0
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners100.0

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners us-gaap:Ownership, us-gaap:LongtermDebtType

si:TrustOne, us-gaap:SubordinatedDebt


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value3.03.03.00.030.03
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners0.00.00.00.00.0

si:TrustTwo, us-gaap:SubordinatedDebt


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value3.03.00.030.030.03
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners0.00.00.00.00.0

us-gaap:NoninterestBearingDepositLiabilities

us-gaap:NoninterestBearingDepositLiabilities


Noninterest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1129068895133216415631745134313941525
Percentage of NoninterestBearingDepositLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesReceivableGross

us-gaap:NotesReceivableGross


Notes
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value733751739797683668695597
Percentage of NotesReceivableGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesReceivableGross us-gaap:Collateral

us-gaap:RealEstate


Notes
Period End2021-03-312020-12-312019-12-31
Value539574614
Percentage of NotesReceivableGross73.576.591.9

us-gaap:NotesReceivableGross us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:CommercialAndIndustrialSector, us-gaap:CommercialPortfolioSegment


Notes
Period End2021-03-312020-12-312020-09-302020-06-302019-12-31
Value11878252414
Percentage of NotesReceivableGross16.210.53.53.12.2

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment


Notes
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value287301316316325331322309
Percentage of NotesReceivableGross39.240.242.839.747.649.646.451.9

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

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans


Notes
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.1726.2721310107.2133.9863.847
Percentage of NotesReceivableGross0.70.81.91.41.51.10.60.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily


Notes
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value171187209216202193212190
Percentage of NotesReceivableGross23.325.028.327.129.628.930.632.0

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily


Notes
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value7477727276817740
Percentage of NotesReceivableGross10.110.39.89.011.212.211.26.8

us-gaap:NotesReceivableGross us-gaap:EquitySecuritiesByIndustry, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:RealEstateSector, us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:ConstructionLoans, us-gaap:Pass


Notes
Period End2021-03-312020-12-312019-12-31
Value5.1726.2727.213
Percentage of NotesReceivableGross0.70.81.1

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:Pass


Notes
Period End2021-03-312020-12-312019-12-31
Value163180189
Percentage of NotesReceivableGross22.324.028.4

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:SpecialMention


Notes
Period End2021-03-312020-12-31
Value3.2753.284
Percentage of NotesReceivableGross0.40.4

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, si:OneToFourFamily, us-gaap:Substandard


Notes
Period End2021-03-312020-12-312019-12-31
Value4.4574.1133.962
Percentage of NotesReceivableGross0.60.50.6

us-gaap:RealEstateSector, us-gaap:ResidentialPortfolioSegment, srt:Multifamily, us-gaap:Pass