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Securities - Schedule of Available-for-Sale Securities Held by Company (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,407,770	$ 1,391,379
Gross Unrealized Gains	9,409	13,712
Gross Unrealized Losses	28,269	23,023
Fair Value	1,388,910	1,382,068
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	45,577	55,492
Gross Unrealized Gains	131	213
Gross Unrealized Losses	1,966	1,925
Fair Value	43,742	53,780
Obligations of U.S. Government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	348,769	354,128
Gross Unrealized Gains	4,052	5,928
Gross Unrealized Losses	12,312	11,653
Fair Value	340,509	348,403
Obligations of U.S. states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	80,622	81,517
Gross Unrealized Gains	5	7
Gross Unrealized Losses	5,986	5,214
Fair Value	74,641	76,310
U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	308,634	315,001
Gross Unrealized Gains	358	852
Gross Unrealized Losses	2,537	2,357
Fair Value	306,455	313,496
U.S. Government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	621,668	582,741
Gross Unrealized Gains	4,863	6,712
Gross Unrealized Losses	5,419	1,821
Fair Value	621,112	587,632
U.S. corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,500	2,500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	49	53
Fair Value	$ 2,451	$ 2,447

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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