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Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Securities Available-for-Sale:
Amortized Cost	$ 406,797	$ 455,294
Gross Unrealized Gains	430	58
Gross Unrealized Losses	(37,219)	(47,970)
Fair Value	370,008	407,382
Securities Held-to-Maturity:
Amortized Cost	440,706	449,031
Gross Unrealized Gains	130	356
Gross Unrealized Losses	(34,654)	(43,811)
Fair Value	406,182	405,576
U.S. treasury securities
Securities Available-for-Sale:
Amortized Cost	1,889	500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(6)	(2)
Fair Value	1,883
Securities Held-to-Maturity:
Amortized Cost	94,577	93,306
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,846)	(3,212)
Fair Value	92,731	90,094
U.S. agency securities
Securities Available-for-Sale:
Amortized Cost	4,171	4,500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(256)	(361)
Fair Value	3,915
Securities Held-to-Maturity:
Amortized Cost	16,184	16,282
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,006)	(1,424)
Fair Value	15,178	14,858
Asset backed securities
Securities Available-for-Sale:
Amortized Cost	19,851	25,035
Gross Unrealized Gains	15	0
Gross Unrealized Losses	(193)	(405)
Fair Value	19,673
State, county & municipal securities
Securities Available-for-Sale:
Amortized Cost	111,265	124,524
Gross Unrealized Gains	10	6
Gross Unrealized Losses	(12,629)	(15,494)
Fair Value	98,646
Securities Held-to-Maturity:
Amortized Cost	137,066	136,685
Gross Unrealized Gains	130	356
Gross Unrealized Losses	(11,286)	(13,859)
Fair Value	125,910	123,182
Corporate debt securities
Securities Available-for-Sale:
Amortized Cost	53,330	53,834
Gross Unrealized Gains	0	16
Gross Unrealized Losses	(5,629)	(6,460)
Fair Value	47,701
Mortgage-backed securities
Securities Available-for-Sale:
Amortized Cost	216,291	246,901
Gross Unrealized Gains	405	36
Gross Unrealized Losses	(18,506)	(25,248)
Fair Value	198,190
Securities Held-to-Maturity:
Amortized Cost	192,879	202,758
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(20,516)	(25,316)
Fair Value	$ 172,363	$ 177,442

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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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