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 | us-gaap:HeldToMaturitySecuritiesTransferredSecurityCircumstancesForDecisionToTransfer | parent-child | http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecurities |
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 | us-gaap:DebtSecuritiesHeldToMaturityTransferAmount | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecuritiesScheduleOfHeldToMaturitySecuritiesTable |
 | us-gaap:DebtSecuritiesHeldToMaturityTransferDerivativeHedgeGainLoss | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecuritiesScheduleOfHeldToMaturitySecuritiesTable |
 | us-gaap:HeldToMaturitySecuritiesTransferredSecurityCircumstancesForDecisionToTransfer | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentsDebtAndEquitySecuritiesScheduleOfHeldToMaturitySecuritiesTable |