Investment Securities - Schedule of contractual maturity of debt securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,418,770	$ 1,854,852
Debt Securities, Available-for-sale	1,332,842	1,733,696
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	110,685
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	$ 110,449
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield	3.47%
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost	$ 139,336
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	$ 129,224
Debt Securities, Available-for-sale, Maturity, after 10 Years, Weighted Average Yield	3.08%
Debt Securities, Available-for-sale, Amortized Cost	$ 251,531	423,285
Debt Securities, Available-for-sale	$ 241,184	406,711
Debt Securities, Available-for-Sale, Weighted Average Yield	3.25%
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	$ 1,510
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	$ 1,511
Debt Securities, Available-for-Sale, Weighted Average Yield, Maturity, after Year One Through Five	3.15%
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 703,645	839,399
Debt Securities, Available-for-sale	$ 635,475	756,761
Debt Securities, Available-for-Sale, Weighted Average Yield	1.89%
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	$ 15,096
Debt Securities, Available-for-sale, Maturity, after Five Through Ten Years, Weighted Average Yield	3.89%
Debt Securities, Available-for-sale, Amortized Cost	$ 20,482	17,650
Debt Securities, Available-for-sale	$ 17,897	16,472
Debt Securities, Available-for-Sale, Weighted Average Yield	4.79%
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five	$ 2,832
Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five	$ 2,801
Debt Securities, Available-for-Sale, Weighted Average Yield, Maturity, after Year One Through Five	10.39%
Collateralized Loan Obligations
Investment [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 443,112	535,518
Debt Securities, Available-for-sale	$ 438,286	516,539
Debt Securities, Available-for-Sale, Weighted Average Yield	7.30%
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

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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