 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/BalanceSheetOffsetting |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/BalanceSheetOffsettingOffsettingAssetsTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/BalanceSheetOffsettingOffsettingLiabilitiesTable |
 | us-gaap:DerivativeMember | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldings |
 | us-gaap:DerivativeMember | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentHoldings |
 | us-gaap:DerivativeMember | parent-child | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings |
 | us-gaap:DerivativeMember | domain-member | http://fasb.org/us-gaap/role/disclosure/SummaryOfInvestmentHoldings |
 | us-gaap:DerivativeMember | parent-child | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldings |
 | us-gaap:DerivativeMember | domain-member | http://fasb.org/us-gaap/role/disclosure/OtherThanSecuritiesInvestmentHoldingsInvestmentHoldingsOtherThanSecuritiesTable |
 | us-gaap:DerivativeMember | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNote |
 | us-gaap:DerivativeMember | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentsFederalTaxNoteFederalIncomeTaxNoteTable |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/DerivativeInstrumentsAndHedgingActivities |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/DerivativeInstrumentsAndHedgingActivitiesDerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/DerivativeInstrumentsAndHedgingActivitiesDerivativeTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/DerivativeInstrumentsAndHedgingActivitiesFairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures |
 | us-gaap:SwapMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosures |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosuresFairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosuresFairValueDisclosureOfAssetAndLiabilityNotMeasuredAtFairValueTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosuresFairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosuresFairValueOptionQuantitativeDisclosuresTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialInstrumentsFairValueDisclosuresScheduleOfFairValueOffBalanceSheetRisksTable |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicing |
 | us-gaap:SwapMember | parent-child | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicing |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingAssumptionForFairValueAsOfBalanceSheetDateOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingAssumptionForFairValueOnSecuritizationDateOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingFeesEarnedInExchangeForServicingFinancialAssetsTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingFinancialInstrumentsOwnedAndPledgedAsCollateralTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingScheduleOfAssetsAndAssociatedLiabilitiesAccountedForAsSecuredBorrowingsTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingScheduleOfDerecognizedAssetsSecuritizedOrAssetbackedFinancingArrangementAssetsAndAnyOtherFinancialAssetsManagedTogetherTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingSecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingSecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingSensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingServicingAssetsAtAmortizedValueTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingServicingAssetsAtFairValueTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingServicingLiabilitiesAtFairValueTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingServicingLiabilityAtAmortizedValueTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingTransferOfCertainFinancialAssetsAccountedForAsSecuredBorrowingsTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingTransferOfFinancialAssetsAccountedForAsSalesTable |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/TransfersAndServicingValuationAllowanceForImpairmentOfRecognizedServicingAssetsTable |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:SwapMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftTransferOfCertainFinancialAssetsAccountedForAsSecuredBorrowingsTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftTransferOfFinancialAssetsAccountedForAsSalesTable |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers |
 | us-gaap:SwapMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealers |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealersSecurityOwnedAndSoldNotYetPurchasedAtFairValueTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBrokersAndDealersTransferOfFinancialAssetsAccountedForAsSalesTable |
 | us-gaap:DerivativeMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompany |
 | us-gaap:InterestRateContractMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompany |
 | us-gaap:DerivativeMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentHoldingsTable |
 | us-gaap:InterestRateContractMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInvestmentCompanyInvestmentHoldingsTable |
 | us-gaap:SwapMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA |
 | us-gaap:SwapMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceAFairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable |