ALLOWANCE FOR LOAN AND LEASE LOSSES - Changes in the Allowance for Loan and Lease Losses for the Current and Comparable Quarter and Year-to-Date (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Receivables [Abstract]
Balance at beginning of period	$ 49,422	$ 43,149
Provision for loan and lease losses	1,481	1,735
Loans charged off	(2,514)	(1,367)
Recoveries	418	858
Balance at end of period	48,807	44,375
Balance at beginning of period	8,539	10,249
Provision for loan and lease losses covered	(1,114)	(80)
Loans charged-off	(236)	(1,075)
Recoveries	330	263
Balance at end of period	7,519	9,357
Balance at beginning of period	57,961	53,398
Provision for Loan and Lease Losses	367	1,655
Loans charged-off	(2,750)	(2,442)
Recoveries	748	1,121
Balance at end of period	$ 56,326	$ 53,732