LOANS AND ALLOWANCE FOR LOAN LOSSES - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,179,849	$ 1,011,717	$ 953,346
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	1,161,352	991,780
OAEM
Financing Receivable, Recorded Investment [Line Items]
Loans	8,619	8,317
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	9,878	11,620
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	37,689	38,972	28,046
Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	37,610	38,875
Commercial | OAEM
Financing Receivable, Recorded Investment [Line Items]
Loans	79	97
Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Real Estate | Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	134,436		87,825
Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	14,934	16,249	16,016
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	14,934	16,168
Consumer | OAEM
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	0	81
Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Construction | Real Estate | Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	134,436	95,625
Construction | Real Estate | Pass | Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	121,078	82,351
Construction | Real Estate | OAEM | Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	5,447	5,056
Construction | Real Estate | Substandard | Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	7,911	8,218
Construction | Real Estate | Doubtful | Real Estate Construction
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial – Owner Occupied | Real Estate | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	130,491	126,250	114,146
Commercial – Owner Occupied | Real Estate | Pass | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	128,162	123,491
Commercial – Owner Occupied | Real Estate | OAEM | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	2,329	2,604
Commercial – Owner Occupied | Real Estate | Substandard | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	155
Commercial – Owner Occupied | Real Estate | Doubtful | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial – Non-owner Occupied | Real Estate | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	291,700	270,472	275,314
Commercial – Non-owner Occupied | Real Estate | Pass | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	291,275	269,736
Commercial – Non-owner Occupied | Real Estate | OAEM | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Commercial – Non-owner Occupied | Real Estate | Substandard | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	425	736
Commercial – Non-owner Occupied | Real Estate | Doubtful | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential – 1 to 4 Family | Real Estate | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	518,561	416,317	381,467
Residential – 1 to 4 Family | Real Estate | Pass | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	516,255	413,327
Residential – 1 to 4 Family | Real Estate | OAEM | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	764	560
Residential – 1 to 4 Family | Real Estate | Substandard | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	1,542	2,430
Residential – 1 to 4 Family | Real Estate | Doubtful | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential – Multifamily | Real Estate | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	52,038	47,832	$ 50,532
Residential – Multifamily | Real Estate | Pass | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	52,038	47,832
Residential – Multifamily | Real Estate | OAEM | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential – Multifamily | Real Estate | Substandard | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Residential – Multifamily | Real Estate | Doubtful | Real Estate Mortgage
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 0	$ 0