Securities - Amortized Cost and Fair Value of Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,056,242	$ 1,021,162
Gross Unrealized Gains	1,339	7,496
Gross Unrealized Losses	(47,122)	(42,381)
Fair Value	1,010,459	986,277
Interest receivable	3,400	3,300
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	55,399	86,381
Gross Unrealized Gains	13	110
Gross Unrealized Losses	(1,052)	(1,984)
Fair Value	54,360	84,507
Collateralized mortgage obligations of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	677,097	650,314
Gross Unrealized Gains	797	4,961
Gross Unrealized Losses	(36,003)	(31,012)
Fair Value	641,891	624,263
Residential mortgage-backed securities of U.S. government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	36,669	35,994
Gross Unrealized Gains	5	7
Gross Unrealized Losses	(4,758)	(4,665)
Fair Value	31,916	31,336
Commercial mortgage-backed securities of U.S. government corporations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	282,228	243,571
Gross Unrealized Gains	523	2,411
Gross Unrealized Losses	(5,309)	(4,720)
Fair Value	277,442	241,262
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,849	4,902
Gross Unrealized Gains	1	7
Gross Unrealized Losses	0	0
Fair Value	$ 4,850	$ 4,909