Securities - Fair Value and Unrealized Losses on Debt Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Available-for-sale:
Estimated Fair Value	$ 4,721	$ 296,224
Unrealized Losses	(27)	(20,715)
Estimated Fair Value	494,328	239,756
Unrealized Losses	(60,687)	(40,391)
Estimated Fair Value	499,049	535,980
Unrealized Losses	$ (60,714)	$ (61,106)
Number of Securities | security	216	219
Held-to-maturity:
Estimated Fair Value	$ 0	$ 32,273
Unrealized Losses	0	(5,677)
Estimated Fair Value	31,701	401
Unrealized Losses	(4,807)	(15)
Estimated Fair Value	31,701	32,674
Gross Unrealized Losses	$ (4,807)	$ (5,692)
Number of Securities | security	23	23
U.S. treasury
Available-for-sale:
Estimated Fair Value	$ 0	$ 25,702
Unrealized Losses	0	(967)
Estimated Fair Value	54,234	30,947
Unrealized Losses	(4,234)	(4,394)
Estimated Fair Value	54,234	56,649
Unrealized Losses	$ (4,234)	$ (5,361)
Number of Securities | security	9	10
U.S. agency
Available-for-sale:
Estimated Fair Value	$ 0	$ 0
Unrealized Losses	0	0
Estimated Fair Value	1,839	2,834
Unrealized Losses	(33)	(47)
Estimated Fair Value	1,839	2,834
Unrealized Losses	$ (33)	$ (47)
Number of Securities | security	7	7
Obligations of states and political subdivisions
Available-for-sale:
Estimated Fair Value	$ 0	$ 21,676
Unrealized Losses	0	(3,784)
Estimated Fair Value	25,970	2,753
Unrealized Losses	(4,009)	(1,214)
Estimated Fair Value	25,970	24,429
Unrealized Losses	$ (4,009)	$ (4,998)
Number of Securities | security	19	18
Held-to-maturity:
Estimated Fair Value	$ 0	$ 20,153
Unrealized Losses	0	(4,891)
Estimated Fair Value	21,223	0
Unrealized Losses	(3,987)	0
Estimated Fair Value	21,223	20,153
Gross Unrealized Losses	$ (3,987)	$ (4,891)
Number of Securities | security	8	8
Mortgage backed - residential
Available-for-sale:
Estimated Fair Value	$ 0	$ 51,921
Unrealized Losses	0	(2,939)
Estimated Fair Value	100,571	63,691
Unrealized Losses	(14,974)	(10,887)
Estimated Fair Value	100,571	115,612
Unrealized Losses	$ (14,974)	$ (13,826)
Number of Securities | security	83	87
Held-to-maturity:
Estimated Fair Value	$ 0	$ 7,993
Unrealized Losses	0	(511)
Estimated Fair Value	6,845	0
Unrealized Losses	(560)	0
Estimated Fair Value	6,845	7,993
Gross Unrealized Losses	$ (560)	$ (511)
Number of Securities | security	10	10
Collateralized mortgage obligations
Available-for-sale:
Estimated Fair Value	$ 0	$ 111,360
Unrealized Losses	0	(4,631)
Estimated Fair Value	181,533	92,905
Unrealized Losses	(21,861)	(16,663)
Estimated Fair Value	181,533	204,265
Unrealized Losses	$ (21,861)	$ (21,294)
Number of Securities | security	65	66
Held-to-maturity:
Estimated Fair Value	$ 0	$ 4,127
Unrealized Losses	0	(275)
Estimated Fair Value	3,633	401
Unrealized Losses	(260)	(15)
Estimated Fair Value	3,633	4,528
Gross Unrealized Losses	$ (260)	$ (290)
Number of Securities | security	5	5
Mortgage backed - commercial
Available-for-sale:
Estimated Fair Value	$ 4,721	$ 70,710
Unrealized Losses	(27)	(6,475)
Estimated Fair Value	114,625	46,626
Unrealized Losses	(14,340)	(7,186)
Estimated Fair Value	119,346	117,336
Unrealized Losses	$ (14,367)	$ (13,661)
Number of Securities | security	24	22
Other debt
Available-for-sale:
Estimated Fair Value	$ 0	$ 14,855
Unrealized Losses	0	(1,919)
Estimated Fair Value	15,556	0
Unrealized Losses	(1,236)	0
Estimated Fair Value	15,556	14,855
Unrealized Losses	$ (1,236)	$ (1,919)
Number of Securities | security	9	9