INVESTMENT SECURITIES - Schedule of Held-to-Maturity Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Estimated Fair Value
Less than 12 months, estimated fair value	$ 39,014	$ 48,983
12 months or more, estimated fair value	82,877	65,555
Total estimated fair value	121,891	114,538
Unrealized Losses
Less than 12 months, unrealized losses	(1,784)	(3,413)
12 months or more, unrealized losses	(18,838)	(16,913)
Total unrealized losses	(20,622)	(20,326)
State, county and municipal securities
Estimated Fair Value
Less than 12 months, estimated fair value	7,486	16,512
12 months or more, estimated fair value	19,122	10,013
Total estimated fair value	26,608	26,525
Unrealized Losses
Less than 12 months, unrealized losses	(514)	(1,488)
12 months or more, unrealized losses	(4,783)	(3,892)
Total unrealized losses	(5,297)	(5,380)
Mortgage-backed securities
Estimated Fair Value
Less than 12 months, estimated fair value	31,528	32,471
12 months or more, estimated fair value	63,755	55,542
Total estimated fair value	95,283	88,013
Unrealized Losses
Less than 12 months, unrealized losses	(1,270)	(1,925)
12 months or more, unrealized losses	(14,055)	(13,021)
Total unrealized losses	$ (15,325)	$ (14,946)