INCOME TAXES - Significant Components of Deferred Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Net operating loss carryforward	$ 32,638	$ 40,073
Recognized built-in loss carryforward	5,899	7,580
Acquisition accounting fair value adjustments	4,998	12,885
Allowance for loan losses	3,673	2,990
Federal tax credits carryforward	4,112	3,140
Unrealized losses on securities	2,055	667
Unrealized losses on cash flow hedges	2,596	728
Stock-based compensation	1,997	2,094
Capitalized leases	1,110	1,167
Deferred compensation	1,831	3,024
Other	0	2,942
Total deferred tax assets	60,909	77,290
Valuation allowance	(1,059)	(1,185)
Net deferred tax assets	59,850	76,105
Deferred tax liabilities:
Premises and equipment	3,262	2,568
Prepaid expenses	680	478
Other	301	0
Total deferred tax liabilities	4,243	3,046
Net deferred tax asset	$ 55,607	$ 73,059