LOANS AND ALLOWANCE FOR CREDIT LOSSES - Performance of loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	$ 24,532	$ 24,757
Construction and land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	1,516	1,553
Other residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	2,744	2,750
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	20,260	20,442
Consumer
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	12	12
Current
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	16,605	16,699
Current | Construction and land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	1,516	1,553
Current | Other residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	2,744	2,750
Current | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	12,333	12,384
Current | Consumer
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	12	12
Over 90 Days Past Due
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	7,927	8,058
Over 90 Days Past Due | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	$ 7,927	$ 8,058