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Financial Instruments With Off-Balance Sheet Risk and Financial Instruments With Concentrations of Credit Risk (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Risks and Uncertainties [Abstract] |  |
Unused Commitments to Extend Credit | $ 1,372,182 | $ 1,309,896
Letters of Credit Outstanding, Amount | $ 17,015 | $ 17,195

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Unused amount of commitments to extend credit to customers. + References No definition available. + Details
Name: | us-gaap_UnusedCommitmentsToExtendCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant