LOANS AND ALLOWANCE FOR CREDIT LOSSES - Allowance for credit losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for credit losses:
Beginning	$ 13,888	$ 16,952	$ 10,135
Charge-offs	(764)	(390)	(131)
Recoveries	25	93	19
Provision expense	(92)	(2,767)	6,929
Ending balance	18,112	13,888	16,952
Construction and development
Allowance for credit losses:
Beginning	124	100	178
Provision expense	1	24	(78)
Ending balance	46	124	100
Commercial real estate
Allowance for credit losses:
Beginning	2,811	4,146	5,161
Charge-offs	(455)		(67)
Recoveries	5	7	12
Provision expense	1,240	(1,342)	(960)
Ending balance	6,876	2,811	4,146
Commercial and industrial
Allowance for credit losses:
Beginning	1,326	4,989	438
Charge-offs	(309)	(390)	(64)
Recoveries	20	81
Provision expense	(142)	(3,354)	4,615
Ending balance	588	1,326	4,989
Residential real estate
Allowance for credit losses:
Beginning	9,626	7,717	4,350
Provision expense	(1,195)	1,909	3,367
Ending balance	10,597	9,626	7,717
Consumer and Other
Allowance for credit losses:
Beginning	1		8
Recoveries		5	7
Provision expense	4	(4)	$ (15)
Ending balance	5	$ 1
2016-13 | Adjustment
Allowance for credit losses:
Ending balance	5,055
2016-13 | Adjustment | Construction and development
Allowance for credit losses:
Ending balance	(79)
2016-13 | Adjustment | Commercial real estate
Allowance for credit losses:
Ending balance	3,275
2016-13 | Adjustment | Commercial and industrial
Allowance for credit losses:
Ending balance	(307)
2016-13 | Adjustment | Residential real estate
Allowance for credit losses:
Ending balance	$ 2,166