Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Number of Securities
Less Than 12 Months | security	41	15
12 Months or More | security	96	118
Total | security	137	133
Fair Value
Less Than 12 Months	$ 366,890	$ 45,297
12 Months or More	536,761	794,365
Total	903,651	839,662
Unrealized Losses
Less Than 12 Months	(5,989)	(371)
12 Months or More	(66,740)	(83,380)
Total	$ (72,729)	$ (83,751)
U.S. Treasury securities
Number of Securities
Less Than 12 Months | security	5	1
12 Months or More | security	5	13
Total | security	10	14
Fair Value
Less Than 12 Months	$ 45,045	$ 10,036
12 Months or More	47,723	123,750
Total	92,768	133,786
Unrealized Losses
Less Than 12 Months	(362)	(52)
12 Months or More	(3,915)	(10,454)
Total	$ (4,277)	$ (10,506)
Obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security		0
12 Months or More | security	2	5
Total | security	2	5
Fair Value
Less Than 12 Months	$ 0	$ 0
12 Months or More	15,071	32,513
Total	15,071	32,513
Unrealized Losses
Less Than 12 Months	0	0
12 Months or More	(189)	(829)
Total	$ (189)	$ (829)
Collateralized mortgage obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	22	4
12 Months or More | security	56	57
Total | security	78	61
Fair Value
Less Than 12 Months	$ 209,511	$ 35,161
12 Months or More	318,104	351,220
Total	527,615	386,381
Unrealized Losses
Less Than 12 Months	(3,393)	(318)
12 Months or More	(44,885)	(47,753)
Total	$ (48,278)	$ (48,071)
Residential mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	1	10
12 Months or More | security	21	14
Total | security	22	24
Fair Value
Less Than 12 Months	$ 8	$ 100
12 Months or More	33,030	37,877
Total	33,038	37,977
Unrealized Losses
Less Than 12 Months	0	(1)
12 Months or More	(6,905)	(6,536)
Total	$ (6,905)	$ (6,537)
Commercial mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	9	0
12 Months or More | security	12	29
Total | security	21	29
Fair Value
Less Than 12 Months	$ 88,040	$ 0
12 Months or More	122,833	249,005
Total	210,873	249,005
Unrealized Losses
Less Than 12 Months	(1,741)	0
12 Months or More	(10,846)	(17,808)
Total	$ (12,587)	$ (17,808)
Obligations of states and political subdivisions
Number of Securities
Less Than 12 Months | security	4
12 Months or More | security	0
Total | security	4
Fair Value
Less Than 12 Months	$ 24,286
12 Months or More	0
Total	24,286
Unrealized Losses
Less Than 12 Months	(493)
12 Months or More	0
Total	$ (493)