LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - NON-PERFORMING LOANS (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Non-performing loans and non-performing assets disclosures
Loans on nonaccrual status	$ 16,793	$ 15,892
Loans past due 90 days or more and still on accrual	203	167
Total nonperforming loans	16,996	16,059
Other real estate owned	1,362	1,391
Total nonperforming assets	$ 18,358	$ 17,450
Credit Quality Ratios - Total Company:
Nonperforming loans to total loans (as percent)	0.46%	0.42%
Nonperforming assets to total loans (including OREO) (as percent)	0.49%	0.46%
Nonperforming assets to total assets (as percent)	0.39%	0.36%
Core Banking Activities
Non-performing loans and non-performing assets disclosures
Loans on nonaccrual status	$ 16,793	$ 15,892
Loans past due 90 days or more and still on accrual	$ 81	$ 85
Credit Quality Ratios - Total Company:
Nonperforming loans to total loans (as percent)	0.46%	0.42%
Nonperforming assets to total loans (including OREO) (as percent)	0.50%	0.46%
Nonperforming assets to total assets (as percent)	0.40%	0.36%