Investment Securities - Schedule of Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Available-for-sale
Amortized Cost	$ 439,853	$ 284,770
Gross Unrealized Gains	3,411	11
Gross Unrealized Losses	15,912	24,304
Estimated Fair Value	427,352	260,477
Held-to-maturity
Amortized Cost	354,094	382,447
Gross Unrealized Gains	7	0
Gross Unrealized Losses	28,495	41,799
Estimated Fair Value	325,606	340,648
Amortized Cost	793,947	667,217
Gross Unrealized Gains	3,418	11
Gross Unrealized Losses	44,407	66,103
Estimated Fair Value	752,958	601,125
U.S. Treasury and U.S. government agencies
Available-for-sale
Amortized Cost	20,420	22,247
Gross Unrealized Gains	0	0
Gross Unrealized Losses	478	740
Estimated Fair Value	19,942	21,507
Held-to-maturity
Amortized Cost	233,545	241,941
Gross Unrealized Gains	0	0
Gross Unrealized Losses	18,568	28,133
Estimated Fair Value	214,977	213,808
Mortgage-backed U.S. government agencies
Available-for-sale
Amortized Cost	375,088	222,464
Gross Unrealized Gains	3,200	11
Gross Unrealized Losses	12,665	19,531
Estimated Fair Value	365,623	202,944
Held-to-maturity
Amortized Cost	33,586	37,593
Gross Unrealized Gains	1	0
Gross Unrealized Losses	3,990	5,508
Estimated Fair Value	29,597	32,085
State and political subdivision obligations
Available-for-sale
Amortized Cost	4,334	4,309
Gross Unrealized Gains	0	0
Gross Unrealized Losses	556	713
Estimated Fair Value	3,778	3,596
Held-to-maturity
Amortized Cost	71,517	77,462
Gross Unrealized Gains	6	0
Gross Unrealized Losses	4,585	6,840
Estimated Fair Value	66,938	70,622
Corporate debt securities
Available-for-sale
Amortized Cost	40,011	35,750
Gross Unrealized Gains	211	0
Gross Unrealized Losses	2,213	3,320
Estimated Fair Value	38,009	32,430
Held-to-maturity
Amortized Cost	15,446	25,451
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,352	1,318
Estimated Fair Value	$ 14,094	$ 24,133

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 gain 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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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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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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