LOANS AND ALLOWANCE FOR LOAN LOSSES - Aging (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) quarter component	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Aging categories of performing loans and nonaccrual loans
Current	$ 1,288,346	$ 1,095,474
Total Past Due	16,236	9,832
Total Loans	1,304,582	1,105,306
Non-Accrual	7,103	9,699
90 Days Still Accruing	0	0
Increased amount of interest income on loans	$ 771	423	$ 396
Allowance for loan losses, number of evaluation components | component	2
Impaired loans collectively evaluated	$ 204	169
Number of rolling quarters utilized in charge-off factor calculation | quarter	12
Liability for unfunded commitments	$ 284	284
Commercial
Aging categories of performing loans and nonaccrual loans
Current	928,621	777,756
Total Past Due	12,412	6,153
Total Loans	941,033	783,909
Non-Accrual	4,495	8,350
90 Days Still Accruing	0	0
Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Current	432,097	377,901
Total Past Due	11,434	2,462
Total Loans	443,531	380,363
Non-Accrual	3,684	1,027
90 Days Still Accruing	0	0
Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Current	374,880	300,282
Total Past Due	681	1,574
Total Loans	375,561	301,856
Non-Accrual	385	5,206
90 Days Still Accruing	0	0
Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Current	121,644	99,573
Total Past Due	297	2,117
Total Loans	121,941	101,690
Non-Accrual	426	2,117
90 Days Still Accruing	0	0
Residential
Aging categories of performing loans and nonaccrual loans
Current	291,665	243,177
Total Past Due	3,264	3,037
Total Loans	294,929	246,214
Non-Accrual	2,442	1,157
90 Days Still Accruing	0	0
Home Equity
Aging categories of performing loans and nonaccrual loans
Current	58,575	61,907
Total Past Due	440	493
Total Loans	59,015	62,400
Non-Accrual	84	13
90 Days Still Accruing	0	0
Consumer
Aging categories of performing loans and nonaccrual loans
Current	9,485	12,634
Total Past Due	120	149
Total Loans	9,605	12,783
Non-Accrual	82	179
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	8,489	2,687
Financing Receivables, 30 to 59 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total Past Due	7,061	557
Financing Receivables, 30 to 59 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total Past Due	6,380	512
Financing Receivables, 30 to 59 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total Past Due	681	45
Financing Receivables, 30 to 59 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total Past Due	1,000	1,879
Financing Receivables, 30 to 59 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total Past Due	400	240
Financing Receivables, 30 to 59 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total Past Due	28	11
Financing Receivables, 60 to 89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total Past Due	2,556	4,338
Financing Receivables, 60 to 89 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total Past Due	1,746	3,391
Financing Receivables, 60 to 89 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total Past Due	1,746	1,368
Financing Receivables, 60 to 89 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total Past Due	0	1,149
Financing Receivables, 60 to 89 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total Past Due	0	874
Financing Receivables, 60 to 89 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total Past Due	760	707
Financing Receivables, 60 to 89 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total Past Due	40	240
Financing Receivables, 60 to 89 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total Past Due	10	0
Financing Receivables, Equal to Greater than 90 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total Past Due	5,191	2,807
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total Past Due	3,605	2,205
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total Past Due	3,308	582
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	380
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total Past Due	297	1,243
Financing Receivables, Equal to Greater than 90 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total Past Due	1,504	451
Financing Receivables, Equal to Greater than 90 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total Past Due	0	13
Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total Past Due	$ 82	$ 138