LOANS AND ALLOWANCE FOR LOAN LOSSES - Risk ratings (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	$ 1,161,162	$ 1,143,575
Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	1,141,604	1,127,031
Special Mention
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	800	5,112
Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	18,758	11,432
Construction and development
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	31,436	42,288
Construction and development | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	30,076	40,928
Construction and development | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	1,360	1,360
Commercial real estate
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	423,300	394,963
Commercial real estate | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	416,183	383,857
Commercial real estate | Special Mention
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	800	5,112
Commercial real estate | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	6,317	5,994
Commercial and industrial
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	53,013	33,026
Commercial and industrial | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	52,033	32,040
Commercial and industrial | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	980	986
Residential real estate
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	651,645	670,341
Residential real estate | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	641,544	667,249
Residential real estate | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	10,101	3,092
Consumer and Other
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	1,768	2,957
Consumer and Other | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	$ 1,768	$ 2,957