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Derivative Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Derivative, Notional Amount | $ 1,101,807 | $ 1,226,150
Asset derivatives, Fair value | 21,187 | 48,141
Liability derivatives, Fair value | 21,183 | 47,971
Interest rate swap contracts |  |
Derivative Financial Instruments |  |
Asset derivatives, Fair value | 24,436 | 52,872
Interest rate swap contracts | Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Derivative, Notional Amount | 1,064,721 | 1,155,252
Asset derivatives, Fair value | 20,735 | 46,654
Liability derivatives, Fair value | 21,172 | 47,681
Loan commitments | Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Derivative, Notional Amount | 15,086 | 32,588
Asset derivatives, Fair value | 452 | 1,487
Liability derivatives, Fair value | 0 | 0
Forward contracts - mortgage loan | Non-hedging derivative financial instruments |  |
Derivative Financial Instruments |  |
Derivative, Notional Amount | 22,000 | 38,310
Asset derivatives, Fair value | 0 | 0
Liability derivatives, Fair value | $ 11 | $ 290

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