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 | us-gaap:NontaxableInvestmentSecuritiesAverageAmountOutstanding | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:InterestEarningDepositsInBanksAverageAmountOutstanding | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:FederalFundsSoldAverageOutstanding | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:SecuritiesPurchasedUnderAgreementsToResellAverageAmountOutstanding | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:ShortTermInvestmentsOtherAverageAmountOutstanding | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
 | us-gaap:InterestEarningAssetsAverageAmountOutstanding | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThrift |
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 | us-gaap:TaxableInvestmentSecuritiesAverageAmountOutstanding | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftDistributionOfAssetsLiabilitiesAndStockholdersEquityTable |
 | us-gaap:NontaxableInvestmentSecuritiesAverageAmountOutstanding | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftDistributionOfAssetsLiabilitiesAndStockholdersEquityTable |
 | us-gaap:InterestEarningDepositsInBanksAverageAmountOutstanding | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftDistributionOfAssetsLiabilitiesAndStockholdersEquityTable |
 | us-gaap:FederalFundsSoldAverageOutstanding | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftDistributionOfAssetsLiabilitiesAndStockholdersEquityTable |
 | us-gaap:SecuritiesPurchasedUnderAgreementsToResellAverageAmountOutstanding | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesBankingAndThriftDistributionOfAssetsLiabilitiesAndStockholdersEquityTable |
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