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Nature of Operations and Summary of Significant Accounting Policies - Impact Of Covid-19 (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Loans | $ 9,241,861 | $ 9,243,174
PPP, CARES Act |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Loans | $ 106,600 | $ 667,100

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