Securities - Available for Sale, Gross Unrealized Losses and Fair Values (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	$ 12,665	$ 275,781
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	337	19,984
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	668,093	490,301
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	88,312	67,361
Total, fair value	680,758	766,082
Total, unrealized losses	88,649	87,345
U.S. agency
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	251	8,244
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	0	799
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	8,558	2,587
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	1,074	301
Total, fair value	8,809	10,831
Total, unrealized losses	1,074	1,100
U.S. agency residential mortgage-backed
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	1,481	33,784
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	16	1,920
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	78,989	54,793
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	12,020	8,341
Total, fair value	80,470	88,577
Total, unrealized losses	12,036	10,261
U.S. agency commercial mortgage-backed
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	0	1,609
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	0	73
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	12,157	11,844
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	1,734	1,521
Total, fair value	12,157	13,453
Total, unrealized losses	1,734	1,594
Private label mortgage-backed
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	2,933	39,954
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	222	2,582
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	83,029	53,346
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	8,524	6,014
Total, fair value	85,962	93,300
Total, unrealized losses	8,746	8,596
Other asset backed
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	6,307	110,859
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	92	2,657
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	126,706	83,802
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	2,663	3,373
Total, fair value	133,013	194,661
Total, unrealized losses	2,755	6,030
Obligations of states and political subdivisions
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	1,693	56,455
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	7	10,216
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	284,034	231,705
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	53,923	40,349
Total, fair value	285,727	288,160
Total, unrealized losses	53,930	50,565
Corporate
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	0	24,876
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	0	1,737
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	73,678	51,293
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	8,335	7,414
Total, fair value	73,678	76,169
Total, unrealized losses	8,335	9,151
Trust preferred
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Debt securities, available-for-sale, continuous unrealized loss position, fair values, less than 12 months	0	0
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, less than 12 months	0	0
Debt securities, available-for-sale, continuous unrealized loss position, fair values, 12 months or longer	942	931
Debt securities, available-for-sale, continuous unrealized loss position, gross unrealized losses, 12 months or longer	39	48
Total, fair value	942	931
Total, unrealized losses	$ 39	$ 48