PREMISES AND EQUIPMENT (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Premises and equipment
Gross premises and equipment	$ 38,508	$ 38,508	$ 34,951
Accumulated depreciation	(11,822)	(11,822)	(9,870)
Net premises and equipment	26,686	26,686	25,081
Gain on sale of fixed assets	343
Depreciation expense		2,600	2,000	$ 2,000
Land
Premises and equipment
Gross premises and equipment	3,901	3,901	3,965
Buildings and improvements
Premises and equipment
Gross premises and equipment	17,358	17,358	16,906
Furniture, fixtures and equipment
Premises and equipment
Gross premises and equipment	14,864	14,864	12,127
Construction in progress
Premises and equipment
Gross premises and equipment	855	855	608
Leasehold improvements
Premises and equipment
Gross premises and equipment	$ 1,530	$ 1,530	$ 1,345