LOANS AND ALLOWANCE FOR LOAN LOSSES - Risk ratings (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	$ 1,364,989	$ 1,161,162
Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	1,350,197	1,141,604
Special Mention
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	800	800
Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	13,992	18,758
Construction and development
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	42,820	31,436
Construction and development | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	42,820	30,076
Construction and development | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income		1,360
Commercial real estate
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	427,297	423,300
Commercial real estate | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	420,756	416,183
Commercial real estate | Special Mention
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	800	800
Commercial real estate | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	5,741	6,317
Commercial and industrial
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	138,384	53,013
Commercial and industrial | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	137,481	52,033
Commercial and industrial | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	903	980
Residential real estate
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	755,521	651,645
Residential real estate | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	748,173	641,544
Residential real estate | Substandard
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	7,348	10,101
Consumer and Other
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	967	1,768
Consumer and Other | Pass
Loans credit quality indicator
Loans and Leases Receivable, Net of Deferred Income	$ 967	$ 1,768