LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - NON-PERFORMING LOANS (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Non-performing loans and non-performing assets disclosures
Loans on nonaccrual status	$ 20,574	$ 15,993
Loans past due 90 days or more and still on accrual	175	145
Total nonperforming loans	20,749	16,138
Other real estate owned	119	160
Total nonperforming assets	$ 20,868	$ 16,298
Credit Quality Ratios - Total Company:
Nonperforming loans to total loans (as percent)	0.44%	0.39%
Nonperforming assets to total loans (including OREO) (as percent)	0.45%	0.39%
Nonperforming assets to total assets (as percent)	0.34%	0.31%
Core Banking Activities
Non-performing loans and non-performing assets disclosures
Loans on nonaccrual status	$ 20,574	$ 15,993
Loans past due 90 days or more and still on accrual		$ 13
Credit Quality Ratios - Total Company:
Nonperforming loans to total loans (as percent)	0.45%	0.40%
Nonperforming assets to total loans (including OREO) (as percent)	0.45%	0.40%
Nonperforming assets to total assets (as percent)	0.35%	0.32%