Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Securities Available-for-Sale, Amortized Cost
Due in one year or less	$ 62,369
Due after one year through five years	247,711
Due after five years through ten years	43,941
Due after ten years	181,210
Debt securities excluding securities not due at a single maturity date	535,231
Total	$ 1,662,819	$ 1,678,160
Securities Available-for-Sale, Weighted Average Yield
Due in one year or less (as a percent)	0.69%
Due after one year through five years (as a percent)	1.14%
Due after five years through ten years (as a percent)	2.75%
Due after ten years (as a percent)	3.04%
Debt securities (as a percent)	1.86%
Total (as a percent)	3.00%
Securities Available-for-Sale, Fair Value
Due in one year or less	$ 60,279
Due after one year through five years	231,925
Due after five years through ten years	39,785
Due after ten years	171,938
Debt securities	503,927
Debt Securities, Available-for-sale, Total	1,539,359	1,693,632
Collateralized mortgage obligations
Securities Available-for-Sale, Amortized Cost
Total	596,336	673,238
Securities Available-for-Sale, Fair Value
Debt Securities, Available-for-sale, Total	533,768	672,967
Asset-backed Securities
Securities Available-for-Sale, Amortized Cost
Securities not due at a single maturity date	210,388
Total	$ 210,388	236,293
Securities Available-for-Sale, Weighted Average Yield
Securities not due at a single maturity date, Weighted Average Yield (as a percent)	4.77%
Securities Available-for-Sale, Fair Value
Securities not due at a single maturity date	$ 201,928
Debt Securities, Available-for-sale, Total	201,928	236,877
Collateralized loan obligations.
Securities Available-for-Sale, Amortized Cost
Securities not due at a single maturity date	180,276
Total	$ 180,276	79,838
Securities Available-for-Sale, Weighted Average Yield
Securities not due at a single maturity date, Weighted Average Yield (as a percent)	6.21%
Securities Available-for-Sale, Fair Value
Securities not due at a single maturity date	$ 174,746
Debt Securities, Available-for-sale, Total	174,746	$ 79,763
Mortgage-backed and collateralized mortgage obligations
Securities Available-for-Sale, Amortized Cost
Securities not due at a single maturity date	$ 736,924
Securities Available-for-Sale, Weighted Average Yield
Securities not due at a single maturity date, Weighted Average Yield (as a percent)	2.53%
Securities Available-for-Sale, Fair Value
Securities not due at a single maturity date	$ 658,758