LOANS AND ALLOWANCE FOR CREDIT LOSSES - NON-PERFORMING LOANS (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Non-performing loans and non-performing assets disclosures
Loans on nonaccrual status	$ 20,358	$ 23,332
Loans past due 90 days or more and still on accrual	495	157
Total nonperforming loans	20,853	23,489
Other real estate owned	85	113
Total nonperforming assets	$ 20,938	$ 23,602
Credit Quality Ratios - Total Company:
Nonperforming loans to total loans (as percent)	0.46%	0.53%
Nonperforming assets to total loans (including OREO) (as percent)	0.46%	0.53%
Nonperforming assets to total assets (as percent)	0.37%	0.42%
Core Banking Activities
Non-performing loans and non-performing assets disclosures
Loans on nonaccrual status	$ 20,358	$ 23,332
Credit Quality Ratios - Total Company:
Nonperforming loans to total loans (as percent)	0.46%	0.54%
Nonperforming assets to total loans (including OREO) (as percent)	0.47%	0.54%
Nonperforming assets to total assets (as percent)	0.38%	0.43%