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Cash and Due from Banks (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Cash and Cash Equivalents [Abstract] |  |
Average balance maintained | $ 1,100,000 | $ 307,000
Deposits with other banks used as collateral | $ 5,100 | $ 780

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- Definition Average amount of collected cash balances with commercial banks the Federal Home Loan Banks (FHLBanks) maintain in return for certain services. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CashAndCashEquivalentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116652737&loc=d3e64164-112818 + Details
Name: | us-gaap_DepositLiabilitiesCollateralIssuedFinancialInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant