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Fair Value Measurements and Fair Value of Financial Instruments, Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021
AFS securities [Abstract] |  |
AFS securities | $ 1,619,356 | $ 1,687,361
Equity securities | 29,974 | 33,550
Fair Value Measurements [Abstract] |  |
Collateral dependent impaired loans with specific reserve | 9,300 | 10,200
Reserves on collateral dependent impaired loans | $ 800 | 0
Minimum [Member] |  |
Fair Value Measurements [Abstract] |  |
Liquidation expense ratio on impaired collateral | 10.00% |
Maximum [Member] |  |
Fair Value Measurements [Abstract] |  |
Liquidation expense ratio on impaired collateral | 50.00% |
U.S. Treasury [Member] |  |
AFS securities [Abstract] |  |
AFS securities | $ 115,177 | 73,069
Federal Agency [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 217,432 | 239,931
State & Municipal [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 87,959 | 94,088
Corporate [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 53,180 | 52,003
Recurring Basis [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 1,619,356 | 1,687,361
Equity securities | 29,974 | 33,550
Derivatives | 75,675 | 60,625
Total | 1,725,005 | 1,781,536
Liabilities [Abstract] |  |
Derivatives | 75,193 | 60,263
Total | 75,193 | 60,263
Recurring Basis [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 115,177 | 73,069
Equity securities | 28,974 | 32,550
Derivatives | 0 | 0
Total | 144,151 | 105,619
Liabilities [Abstract] |  |
Derivatives | 0 | 0
Total | 0 | 0
Recurring Basis [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 1,504,179 | 1,614,292
Equity securities | 1,000 | 1,000
Derivatives | 75,675 | 60,625
Total | 1,580,854 | 1,675,917
Liabilities [Abstract] |  |
Derivatives | 75,193 | 60,263
Total | 75,193 | 60,263
Recurring Basis [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Equity securities | 0 | 0
Derivatives | 0 | 0
Total | 0 | 0
Liabilities [Abstract] |  |
Derivatives | 0 | 0
Total | 0 | 0
Recurring Basis [Member] | U.S. Treasury [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 115,177 | 73,069
Recurring Basis [Member] | U.S. Treasury [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 115,177 | 73,069
Recurring Basis [Member] | U.S. Treasury [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | U.S. Treasury [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Federal Agency [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 217,432 | 239,931
Recurring Basis [Member] | Federal Agency [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Federal Agency [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 217,432 | 239,931
Recurring Basis [Member] | Federal Agency [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | State & Municipal [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 87,959 | 94,088
Recurring Basis [Member] | State & Municipal [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | State & Municipal [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 87,959 | 94,088
Recurring Basis [Member] | State & Municipal [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Mortgage-Backed [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 522,045 | 606,675
Recurring Basis [Member] | Mortgage-Backed [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Mortgage-Backed [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 522,045 | 606,675
Recurring Basis [Member] | Mortgage-Backed [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 623,563 | 621,595
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 623,563 | 621,595
Recurring Basis [Member] | Collateralized Mortgage Obligations [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Corporate [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 53,180 | 52,003
Recurring Basis [Member] | Corporate [Member] | Level 1 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 0 | 0
Recurring Basis [Member] | Corporate [Member] | Level 2 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | 53,180 | 52,003
Recurring Basis [Member] | Corporate [Member] | Level 3 [Member] |  |
AFS securities [Abstract] |  |
AFS securities | $ 0 | $ 0

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