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Investment Securities - Schedule of Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Available-for-sale
Amortized Cost	$ 232,687	$ 245,886
Gross Unrealized Gains	0	0
Gross Unrealized Losses	24,751	22,331
Estimated Fair Value	207,936	223,555
Held-to-maturity
Amortized Cost	393,320	399,128
Gross Unrealized Gains	0	13
Gross Unrealized Losses	46,045	41,620
Estimated Fair Value	347,275	357,521
Amortized Cost	626,007	645,014
Gross Unrealized Gains	0	13
Gross Unrealized Losses	70,796	63,951
Estimated Fair Value	555,211	581,076
U.S. Treasury and U.S. government agencies
Available-for-sale
Amortized Cost	31,693	36,637
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,074	988
Estimated Fair Value	30,619	35,649
Held-to-maturity
Amortized Cost	245,873	245,805
Gross Unrealized Gains	0	2
Gross Unrealized Losses	30,436	28,676
Estimated Fair Value	215,437	217,131
Mortgage-backed U.S. government agencies
Available-for-sale
Amortized Cost	160,932	169,184
Gross Unrealized Gains	0	0
Gross Unrealized Losses	18,895	16,501
Estimated Fair Value	142,037	152,683
Held-to-maturity
Amortized Cost	40,845	43,818
Gross Unrealized Gains	0	0
Gross Unrealized Losses	5,776	5,523
Estimated Fair Value	35,069	38,295
State and political subdivision obligations
Available-for-sale
Amortized Cost	4,320	4,332
Gross Unrealized Gains	0	0
Gross Unrealized Losses	729	686
Estimated Fair Value	3,591	3,646
Held-to-maturity
Amortized Cost	81,142	84,035
Gross Unrealized Gains	0	11
Gross Unrealized Losses	7,719	6,486
Estimated Fair Value	73,423	77,560
Corporate debt securities
Available-for-sale
Amortized Cost	35,742	35,733
Gross Unrealized Gains	0	0
Gross Unrealized Losses	4,053	4,156
Estimated Fair Value	31,689	31,577
Held-to-maturity
Amortized Cost	25,460	25,470
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,114	935
Estimated Fair Value	$ 23,346	$ 24,535

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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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