INVESTMENT SECURITIES - Schedule of Held-to-Maturity Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Estimated Fair Value
Less than 12 months, estimated fair value	$ 40,496	$ 48,983
12 months or more, estimated fair value	75,597	65,555
Total estimated fair value	116,093	114,538
Unrealized Losses
Less than 12 months, unrealized losses	(1,904)	(3,413)
12 months or more, unrealized losses	(16,178)	(16,913)
Total unrealized losses	(18,082)	(20,326)
State, county and municipal securities
Estimated Fair Value
Less than 12 months, estimated fair value	7,746	16,512
12 months or more, estimated fair value	19,584	10,013
Total estimated fair value	27,330	26,525
Unrealized Losses
Less than 12 months, unrealized losses	(254)	(1,488)
12 months or more, unrealized losses	(4,321)	(3,892)
Total unrealized losses	(4,575)	(5,380)
Mortgage-backed securities
Estimated Fair Value
Less than 12 months, estimated fair value	32,750	32,471
12 months or more, estimated fair value	56,013	55,542
Total estimated fair value	88,763	88,013
Unrealized Losses
Less than 12 months, unrealized losses	(1,650)	(1,925)
12 months or more, unrealized losses	(11,857)	(13,021)
Total unrealized losses	$ (13,507)	$ (14,946)