LOANS AND ALLOWANCE FOR LOAN LOSSES - Aging (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) quarter component	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Aging categories of performing loans and nonaccrual loans
Current	$ 1,045,208	$ 1,013,306
Total past due	7,657	18,864
Total loans	1,052,865	1,032,170
Non-accrual	6,229	9,405
90 days still accruing	0	848
Increased amount of interest income on loans	$ 396	639	$ 221
Allowance for loan losses, number of evaluation components | component	2
Number of rolling quarters utilized in charge-off factor calculation | quarter	12
Liability for unfunded commitments	$ 284	224
Commercial
Aging categories of performing loans and nonaccrual loans
Current	753,561	714,151
Total past due	3,955	15,168
Total loans	757,516	729,319
Non-accrual	4,975	8,195
90 days still accruing	0	848
Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Current	387,208	299,515
Total past due	258	968
Total loans	387,466	300,483
Non-accrual	74	687
90 days still accruing	0	0
Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Current	270,339	307,029
Total past due	1,121	10,728
Total loans	271,460	317,757
Non-accrual	1,375	5,020
90 days still accruing	0	541
Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Current	96,014	107,607
Total past due	2,576	3,472
Total loans	98,590	111,079
Non-accrual	3,526	2,488
90 days still accruing	0	307
Residential
Aging categories of performing loans and nonaccrual loans
Current	212,502	214,326
Total past due	2,950	3,040
Total loans	215,452	217,366
Non-accrual	1,072	803
90 days still accruing	0	0
Home Equity
Aging categories of performing loans and nonaccrual loans
Current	64,791	67,908
Total past due	595	216
Total loans	65,386	68,124
Non-accrual	104	36
90 days still accruing	0	0
Consumer
Aging categories of performing loans and nonaccrual loans
Current	14,354	16,921
Total past due	157	440
Total loans	14,511	17,361
Non-accrual	78	371
90 days still accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total past due	4,144	10,020
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total past due	3,542	9,023
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total past due	74	668
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	892	5,561
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total past due	2,576	2,794
Financing Receivables, Equal to Greater than 90 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total past due	464	626
Financing Receivables, Equal to Greater than 90 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total past due	70	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total past due	68	371
Financing Receivables, 30 to 59 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total past due	2,891	3,323
Financing Receivables, 30 to 59 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total past due	244	1,414
Financing Receivables, 30 to 59 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total past due	15	300
Financing Receivables, 30 to 59 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total past due	229	436
Financing Receivables, 30 to 59 Days Past Due | Commercial | Acquisition & Development
Aging categories of performing loans and nonaccrual loans
Total past due	0	678
Financing Receivables, 30 to 59 Days Past Due | Residential
Aging categories of performing loans and nonaccrual loans
Total past due	2,067	1,838
Financing Receivables, 30 to 59 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total past due	525	23
Financing Receivables, 30 to 59 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total past due	55	48
Financing Receivables, 60 to 89 Days Past Due
Aging categories of performing loans and nonaccrual loans
Total past due	622	5,521
Financing Receivables, 60 to 89 Days Past Due | Commercial
Aging categories of performing loans and nonaccrual loans
Total past due	169	4,731
Financing Receivables, 60 to 89 Days Past Due | Commercial | Commercial Business
Aging categories of performing loans and nonaccrual loans
Total past due	169	0
Financing Receivables, 60 to 89 Days Past Due | Commercial | Commercial Real Estate
Aging categories of performing loans and nonaccrual loans
Total past due	0	4,731
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	419	576
Financing Receivables, 60 to 89 Days Past Due | Home Equity
Aging categories of performing loans and nonaccrual loans
Total past due	0	193
Financing Receivables, 60 to 89 Days Past Due | Consumer
Aging categories of performing loans and nonaccrual loans
Total past due	$ 34	$ 21