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Commitments, Contingencies, and Concentrations of Credit Risk - Schedule of Outstanding Loan Commitments (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Loss Contingencies [Line Items] |  |
Loan commitments | $ 332,963 | $ 386,944
Unused lines of credit | 1,088,060 | 935,728
Total | 1,421,023 | 1,322,672
Fixed Rate |  |
Loss Contingencies [Line Items] |  |
Loan commitments | 238,745 | 263,775
Unused lines of credit | 188,014 | 169,278
Total | 426,759 | 433,053
Variable Rate |  |
Loss Contingencies [Line Items] |  |
Loan commitments | 94,218 | 123,169
Unused lines of credit | 900,046 | 766,450
Total | $ 994,264 | $ 889,619

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- Definition The total amount of off-balance sheet lending-related financial instruments (e.g., commitments), which represents the maximum possible credit risk should the counterparty draw upon the commitment. + References No definition available. + Details
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- Definition The off-balance sheet contractual amount of lending-related commitments for closed-end loans. + References No definition available. + Details
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- Definition The off-balance sheet amount of unfunded revolving lines of credit, credit cards and home equity loan commitments. + References No definition available. + Details
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