PREMISES AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Less: accumulated depreciation	$ (22,535)	$ (14,532)
Total	103,954	73,739
Depreciation on premises and equipment	8,756	6,155	$ 4,683
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	31,555	21,444
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	70,276	41,199
Furniture, software, and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 24,658	$ 25,628