Investment Securities - Schedule of Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Available-for-sale
Amortized Cost	$ 496,791	$ 426,512
Gross Unrealized Gains	2,613	4,037
Gross Unrealized Losses	15,274	14,235
Estimated Fair Value	484,130	416,314
Held-to-maturity
Amortized Cost	340,957	347,285
Gross Unrealized Gains	8	16
Gross Unrealized Losses	26,567	25,599
Estimated Fair Value	314,398	321,702
Amortized Cost	837,748	773,797
Gross Unrealized Gains	2,621	4,053
Gross Unrealized Losses	41,841	39,834
Estimated Fair Value	798,528	738,016
U.S. Treasury and U.S. government agencies
Available-for-sale
Amortized Cost	17,266	19,446
Gross Unrealized Gains	0	0
Gross Unrealized Losses	404	380
Estimated Fair Value	16,862	19,066
Held-to-maturity
Amortized Cost	231,015	231,980
Gross Unrealized Gains	0	0
Gross Unrealized Losses	17,042	16,566
Estimated Fair Value	213,973	215,414
Mortgage-backed U.S. government agencies
Available-for-sale
Amortized Cost	386,477	361,109
Gross Unrealized Gains	2,236	3,788
Gross Unrealized Losses	12,492	11,500
Estimated Fair Value	376,221	353,397
Held-to-maturity
Amortized Cost	31,214	32,418
Gross Unrealized Gains	3	4
Gross Unrealized Losses	3,665	3,747
Estimated Fair Value	27,552	28,675
State and political subdivision obligations
Available-for-sale
Amortized Cost	51,406	4,319
Gross Unrealized Gains	0	0
Gross Unrealized Losses	552	485
Estimated Fair Value	50,854	3,834
Held-to-maturity
Amortized Cost	63,281	67,441
Gross Unrealized Gains	2	12
Gross Unrealized Losses	4,619	4,043
Estimated Fair Value	58,664	63,410
Corporate debt securities
Available-for-sale
Amortized Cost	41,642	41,638
Gross Unrealized Gains	377	249
Gross Unrealized Losses	1,826	1,870
Estimated Fair Value	40,193	40,017
Held-to-maturity
Amortized Cost	15,447	15,446
Gross Unrealized Gains	3	0
Gross Unrealized Losses	1,241	1,243
Estimated Fair Value	$ 14,209	$ 14,203

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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Amount of cumulative unrecognized loss on investment in debt security measured at amortized cost (held-to-maturity) and 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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Fair value of investment in debt security measured at amortized cost (held-to-maturity) and 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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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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