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Investment Securities - Schedule of contractual maturity of debt securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Investment [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 1,854,852 | $ 1,727,363
Debt Securities, Available-for-sale | 1,733,696 | 1,754,140
Obligations of States and Political Subdivisions |  |
Investment [Line Items] |  |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost | 271,564 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | $ 271,658 |
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield | 3.68% |
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost | $ 149,432 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value | $ 132,775 |
Debt Securities, Available-for-sale, Maturity, after 10 Years, Weighted Average Yield | 3.15% |
Debt Securities, Available-for-sale, Amortized Cost | $ 423,285 | 366,933
Debt Securities, Available-for-sale | $ 406,711 | 389,591
Available for Sale Securities Weighted Avg Yield | 3.49% |
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | $ 2,289 |
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | $ 2,278 |
Debt Securities, Available-for-Sale, Weighted Average Yield, Maturity, after Year One Through Five | 2.97% |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Investment [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 839,399 | 849,114
Debt Securities, Available-for-sale | $ 756,761 | 854,463
Debt Securities, Available-for-Sale, Weighted Average Yield | 1.91% |
Corporate Debt Securities |  |
Investment [Line Items] |  |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost | $ 17,650 |
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value | $ 16,472 |
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield | 3.89% |
Debt Securities, Available-for-sale, Amortized Cost | $ 17,650 | 11,250
Debt Securities, Available-for-sale | 16,472 | 11,412
Collateralized Loan Obligations |  |
Investment [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 535,518 | 500,066
Debt Securities, Available-for-sale | $ 516,539 | $ 498,674
Debt Securities, Available-for-Sale, Weighted Average Yield | 6.30% |
US Government-sponsored Enterprises Debt Securities |  |
Investment [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 39,000 |
Debt Securities, Available-for-sale | 37,213 |
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five | 39,000 |
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five | $ 37,213 |
Debt Securities, Available-for-Sale, Weighted Average Yield, Maturity, after Year One Through Five | 2.37% |

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