INVESTMENT SECURITIES - Amortized Cost and Estimated Fair Value of Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 142,513	$ 134,864
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(20,622)	(20,326)
Estimated Fair Value	121,891	114,538
State, county and municipal securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	31,905	31,905
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5,297)	(5,380)
Estimated Fair Value	26,608	26,525
Mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	110,608	102,959
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(15,325)	(14,946)
Estimated Fair Value	$ 95,283	$ 88,013