PREMISES AND EQUIPMENT - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 117,504	$ 108,973
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	54,531	48,446
Net	62,973	60,527
Depreciation expense	6,410	5,886	$ 5,783
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,491	15,019
Buildings
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	58,175	55,312
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 43,838	$ 38,642