Investment Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Sep. 01, 2022
Securities Available for Sale:
Amortized Cost	$ 485,276	$ 490,206
Gross Unrealized Gains	67	173
Gross Unrealized Losses	(50,638)	(57,826)
Fair Value	434,705	432,553
Securities Held to Maturity:
Amortized Cost	463,946	465,858
Gross Unrealized Gains	157	32
Gross Unrealized Losses	(45,032)	(54,626)
Fair Value	419,071	411,264	$ 477,000
U.S. treasury securities
Securities Available for Sale:
Amortized Cost	1,346	1,644
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(22)	(22)
Fair Value	1,324	1,622
Securities Held to Maturity:
Amortized Cost	92,032	91,615
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,856)	(4,149)
Fair Value	89,176	87,466
U.S. agency
Securities Available for Sale:
Amortized Cost	4,913	5,035
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(386)	(450)
Fair Value	4,527	4,585
Securities Held to Maturity:
Amortized Cost	16,377	16,409
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,573)	(1,838)
Fair Value	14,804	14,571
Asset backed securities
Securities Available for Sale:
Amortized Cost	29,573	31,468
Gross Unrealized Gains	9	0
Gross Unrealized Losses	(723)	(1,480)
Fair Value	28,859	29,988
State, county & municipal securities
Securities Available for Sale:
Amortized Cost	125,765	126,119
Gross Unrealized Gains	7	0
Gross Unrealized Losses	(17,739)	(21,363)
Fair Value	108,033	104,756
Securities Held to Maturity:
Amortized Cost	136,270	136,138
Gross Unrealized Gains	157	32
Gross Unrealized Losses	(14,957)	(19,518)
Fair Value	121,470	116,652
Corporate debt securities
Securities Available for Sale:
Amortized Cost	54,712	54,741
Gross Unrealized Gains	22	164
Gross Unrealized Losses	(6,116)	(5,320)
Fair Value	48,618	49,585
Mortgage-backed securities
Securities Available for Sale:
Amortized Cost	268,967	271,199
Gross Unrealized Gains	29	9
Gross Unrealized Losses	(25,652)	(29,191)
Fair Value	243,344	242,017
Securities Held to Maturity:
Amortized Cost	219,267	221,696
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(25,646)	(29,121)
Fair Value	$ 193,621	$ 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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