Securities - Fair Value and Age of Gross Unrealized Losses of Debt Securities (Details) $ in Thousands	Dec. 31, 2025 USD ($) security	Dec. 31, 2024 USD ($) security
Number of Securities
Less Than 12 Months | security	5	41
12 Months or More | security	87	96
Total | security	92	137
Fair Value
Less Than 12 Months	$ 44,936	$ 366,890
12 Months or More	514,419	536,761
Total	559,355	903,651
Unrealized Losses
Less Than 12 Months	(81)	(5,989)
12 Months or More	(42,300)	(66,740)
Total	$ (42,381)	$ (72,729)
U.S. Treasury securities
Number of Securities
Less Than 12 Months | security	0	5
12 Months or More | security	7	5
Total | security	7	10
Fair Value
Less Than 12 Months	$ 0	$ 45,045
12 Months or More	69,409	47,723
Total	69,409	92,768
Unrealized Losses
Less Than 12 Months	0	(362)
12 Months or More	(1,984)	(3,915)
Total	$ (1,984)	$ (4,277)
Obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security		0
12 Months or More | security		2
Total | security		2
Fair Value
Less Than 12 Months		$ 0
12 Months or More		15,071
Total		15,071
Unrealized Losses
Less Than 12 Months		0
12 Months or More		(189)
Total		$ (189)
Collateralized mortgage obligations of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	4	22
12 Months or More | security	55	56
Total | security	59	78
Fair Value
Less Than 12 Months	$ 34,993	$ 209,511
12 Months or More	299,732	318,104
Total	334,725	527,615
Unrealized Losses
Less Than 12 Months	(52)	(3,393)
12 Months or More	(30,960)	(44,885)
Total	$ (31,012)	$ (48,278)
Residential mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	0	1
12 Months or More | security	15	21
Total | security	15	22
Fair Value
Less Than 12 Months	$ 0	$ 8
12 Months or More	31,171	33,030
Total	31,171	33,038
Unrealized Losses
Less Than 12 Months	0	0
12 Months or More	(4,665)	(6,905)
Total	$ (4,665)	$ (6,905)
Commercial mortgage-backed securities of U.S. government corporations and agencies
Number of Securities
Less Than 12 Months | security	1	9
12 Months or More | security	10	12
Total | security	11	21
Fair Value
Less Than 12 Months	$ 9,943	$ 88,040
12 Months or More	114,107	122,833
Total	124,050	210,873
Unrealized Losses
Less Than 12 Months	(29)	(1,741)
12 Months or More	(4,691)	(10,846)
Total	$ (4,720)	$ (12,587)
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)