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Loans and Allowance for Credit Losses - Loan Modifications not Classified as TDRs (Details) $ in Thousands | Dec. 31, 2021 USD ($) contract | Dec. 31, 2020 USD ($) contract
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Receivables [Abstract] |  |
Portfolio loans, Interest only | $ | $ 49,219 | $ 43,379
Portfolio loans, Full Payment Deferral | $ | 31 | 22,165
Portfolio loans, Total | $ | $ 49,250 | $ 65,544
Number of modifications, Interest Only | contract | 16,000 | 23,000
Number of modifications, Full Payment Deferral | contract | 1,000 | 11,000
Number of modifications, Total | contract | 17,000 | 34,000

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