LOANS AND ALLOWANCE FOR LOAN LOSSES - Aging (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) component	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Aging categories of performing loans and nonaccrual loans
Current	$ 1,364,896	$ 1,288,346
Total Past Due	9,339	16,236
Total Loans	1,374,235	1,304,582
Non-Accrual	5,123	7,103
90+ Days Still Accruing	0	0
Increased amount of interest income on loans	$ 582	771	$ 423
Allowance for loan losses, number of evaluation components | component	2
Impaired loans collectively evaluated	$ 139	204
Liability for unfunded commitments	332	284
Commercial
Aging categories of performing loans and nonaccrual loans
Current	1,059,389	928,621
Total Past Due	4,439	12,412
Total Loans	1,063,828	941,033
Non-Accrual	3,533	4,495
90+ Days Still Accruing	0	0
Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Current	537,602	432,097
Total Past Due	3,280	11,434
Total Loans	540,882	443,531
Non-Accrual	2,848	3,684
90+ Days Still Accruing	0	0
Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Current	411,070	374,880
Total Past Due	700	681
Total Loans	411,770	375,561
Non-Accrual	295	385
90+ Days Still Accruing	0	0
Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Current	110,717	121,644
Total Past Due	459	297
Total Loans	111,176	121,941
Non-Accrual	390	426
90+ Days Still Accruing	0	0
Residential
Aging categories of performing loans and nonaccrual loans
Current	267,515	291,665
Total Past Due	4,089	3,264
Total Loans	271,604	294,929
Non-Accrual	1,461	2,442
90+ Days Still Accruing	0	0
Home Equity
Aging categories of performing loans and nonaccrual loans
Current	34,382	58,575
Total Past Due	724	440
Total Loans	35,106	59,015
Non-Accrual	95	84
90+ Days Still Accruing	0	0
Consumer
Aging categories of performing loans and nonaccrual loans
Current	3,610	9,485
Total Past Due	87	120
Total Loans	3,697	9,605
Non-Accrual	34	82
90+ Days Still Accruing	0	0
Financing Receivables, 30 to 59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total Past Due	7,440	8,489
Financing Receivables, 30 to 59 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total Past Due	3,891	7,061
Financing Receivables, 30 to 59 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total Past Due	3,189	6,380
Financing Receivables, 30 to 59 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total Past Due	522	681
Financing Receivables, 30 to 59 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total Past Due	180	0
Financing Receivables, 30 to 59 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total Past Due	3,003	1,000
Financing Receivables, 30 to 59 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total Past Due	545	400
Financing Receivables, 30 to 59 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total Past Due	1	28
Financing Receivables, 60 to 89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total Past Due	916	2,556
Financing Receivables, 60 to 89 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total Past Due	225	1,746
Financing Receivables, 60 to 89 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total Past Due	47	1,746
Financing Receivables, 60 to 89 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total Past Due	178	0
Financing Receivables, 60 to 89 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total Past Due	549	760
Financing Receivables, 60 to 89 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total Past Due	84	40
Financing Receivables, 60 to 89 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total Past Due	58	10
Financing Receivables, Equal to Greater than 90 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total Past Due	983	5,191
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total Past Due	323	3,605
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total Past Due	44	3,308
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total Past Due	279	297
Financing Receivables, Equal to Greater than 90 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total Past Due	537	1,504
Financing Receivables, Equal to Greater than 90 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total Past Due	95	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total Past Due	$ 28	$ 82