Investment Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 01, 2022
Securities Available for Sale:
Amortized Cost	$ 463,896	$ 490,206
Gross Unrealized Gains	6	173
Gross Unrealized Losses	(64,355)	(57,826)
Fair Value	399,547	432,553
Securities Held to Maturity:
Amortized Cost	451,056	465,858
Gross Unrealized Gains	0	32
Gross Unrealized Losses	(65,991)	(54,626)
Fair Value	385,065	411,264	$ 477,000
U.S. treasury securities
Securities Available for Sale:
Amortized Cost	799	1,644
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(8)	(22)
Fair Value	791	1,622
Securities Held to Maturity:
Amortized Cost	92,880	91,615
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5,483)	(4,149)
Fair Value	87,397	87,466
U.S. agency securities
Securities Available for Sale:
Amortized Cost	4,613	5,035
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(510)	(450)
Fair Value	4,103	4,585
Securities Held to Maturity:
Amortized Cost	16,314	16,409
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,975)	(1,838)
Fair Value	14,339	14,571
Asset backed securities
Securities Available for Sale:
Amortized Cost	27,250	31,468
Gross Unrealized Gains	6	0
Gross Unrealized Losses	(411)	(1,480)
Fair Value	26,845	29,988
State, county & municipal securities
Securities Available for Sale:
Amortized Cost	124,882	126,119
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(23,228)	(21,363)
Fair Value	101,654	104,756
Securities Held to Maturity:
Amortized Cost	136,546	136,138
Gross Unrealized Gains	0	32
Gross Unrealized Losses	(22,986)	(19,518)
Fair Value	113,560	116,652
Corporate debt securities
Securities Available for Sale:
Amortized Cost	54,694	54,741
Gross Unrealized Gains	0	164
Gross Unrealized Losses	(7,665)	(5,320)
Fair Value	47,029	49,585
Mortgage-backed securities
Securities Available for Sale:
Amortized Cost	251,658	271,199
Gross Unrealized Gains	0	9
Gross Unrealized Losses	(32,533)	(29,191)
Fair Value	219,125	242,017
Securities Held to Maturity:
Amortized Cost	205,316	221,696
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(35,547)	(29,121)
Fair Value	$ 169,769	$ 192,575

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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