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]
Premises and equipment, gross	$ 116,833	$ 112,474
Less accumulated depreciation and amortization	(47,879)	(43,369)
Premises and equipment, net	68,954	69,105
Depreciation expense	5,920	6,168	$ 6,062
Land
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	17,693	16,253
Buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	56,674	54,126
Furniture, fixtures, and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	29,042	28,165
Automobiles
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	1,854	1,787
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	10,671	10,725
Construction-in-process
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 899	$ 1,418