 | us-gaap:FinancialInstrumentAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | srt:CreditRatingMoodysAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | srt:CreditRatingStandardPoorsAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | srt:CreditRatingFitchAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:CreditScoreFicoAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:InternalCreditAssessmentAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:CreditLossStatusAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:FinancialInstrumentPerformanceStatusAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:CoreAndNonCoreStatusAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:LoanToValueAxis | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:DebtSecuritiesHeldToMaturityCreditQualityIndicatorLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/CreditLosses |
 | us-gaap:FinancialInstrumentAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | srt:CreditRatingMoodysAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | srt:CreditRatingStandardPoorsAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | srt:CreditRatingFitchAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | us-gaap:CreditScoreFicoAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | us-gaap:InternalCreditAssessmentAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | us-gaap:CreditLossStatusAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | us-gaap:FinancialInstrumentPerformanceStatusAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | us-gaap:CoreAndNonCoreStatusAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |
 | us-gaap:LoanToValueAxis | hypercube-dimension | http://fasb.org/us-gaap/role/disclosure/CreditLossesDebtSecuritiesHeldToMaturityCreditQualityIndicatorTable |