ALLOWANCE FOR LOAN LOSSES - Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 17,000	$ 13,500	$ 17,500	$ 7,400
Charge-offs	(181)	0	183	18
Recoveries	4	7	13	14
Provision for (reversal of) loan losses	477	2,293	(30)	8,404
Ending balance	17,300	15,800	17,300	15,800
Commercial Portfolio Segment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,645	3,474	4,042	1,788
Charge-offs	(180)	0	182	0
Recoveries	3	3	9	10
Provision for (reversal of) loan losses	(113)	478	(514)	2,157
Ending balance	3,355	3,955	3,355	3,955
Construction and Land Portfolio Segment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	224	351	378	167
Charge-offs	0	0	0	0
Recoveries	1	4	4	4
Provision for (reversal of) loan losses	15	257	(142)	441
Ending balance	240	612	240	612
Commercial Real Estate Portfolio Segment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	11,328	8,245	11,211	5,004
Charge-offs	(1)	0	1	0
Recoveries	0	0	0	0
Provision for (reversal of) loan losses	717	1,352	834	4,593
Ending balance	12,044	9,597	12,044	9,597
Residential Portfolio Segment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,782	1,428	1,856	427
Charge-offs	0	0	0	1
Recoveries	0	0	0	0
Provision for (reversal of) loan losses	(141)	204	(215)	1,206
Ending balance	1,641	1,632	1,641	1,632
Consumer Portfolio Segment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	21	2	13	14
Charge-offs	0	0	0	17
Recoveries	0	0	0	0
Provision for (reversal of) loan losses	(1)	2	7	7
Ending balance	$ 20	$ 4	$ 20	$ 4