LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Aging analysis of recorded investments by class (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 1,305	$ 15,102
Total current	928,560	877,693
Total Recorded Investment	929,865	892,795
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	92	898
90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,213	14,204
Cash, Securities and Other
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	92	11,583
Total current	130,549	102,582
Total Recorded Investment	130,641	114,165
Cash, Securities and Other | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	92	331
Cash, Securities and Other | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		11,252
Construction and Development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	37,128	31,897
Total Recorded Investment	37,128	31,897
1-4 Family Residential, Non-Owner Occupied CRE and Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,200
1-4 Family Residential
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,213	1,217
Total current	359,394	349,635
Total Recorded Investment	360,607	350,852
1-4 Family Residential | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,213	1,217
Non-Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		567
Total current	172,014	173,174
Total Recorded Investment	172,014	173,741
Non-Owner Occupied CRE | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		567
Owner Occupied CRE
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total current	108,873	108,480
Total Recorded Investment	108,873	108,480
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		1,735
Total current	120,602	111,925
Total Recorded Investment	$ 120,602	113,660
Commercial and Industrial | 90 or More Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due		$ 1,735