Securities - Amortized Cost and Fair Value of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,021,162	$ 1,058,154
Gross Unrealized Gains	7,496	990
Gross Unrealized Losses	(42,381)	(72,729)
Fair Value	986,277	986,415
Interest receivable	3,300	3,700
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	86,381	97,045
Gross Unrealized Gains	110	0
Gross Unrealized Losses	(1,984)	(4,277)
Fair Value	84,507	92,768
Obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	15,260
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	(189)
Fair Value	0	15,071
Collateralized mortgage obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	650,314	643,690
Gross Unrealized Gains	4,961	872
Gross Unrealized Losses	(31,012)	(48,278)
Fair Value	624,263	596,284
Residential mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	35,994	40,109
Gross Unrealized Gains	7	3
Gross Unrealized Losses	(4,665)	(6,905)
Fair Value	31,336	33,207
Commercial mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	243,571	237,270
Gross Unrealized Gains	2,411	115
Gross Unrealized Losses	(4,720)	(12,587)
Fair Value	241,262	224,798
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,902	24,780
Gross Unrealized Gains	7	0
Gross Unrealized Losses	0	(493)
Fair Value	$ 4,909	$ 24,287