GOODWILL AND INTANGIBLE - Carrying Amount and Intangible Weighted Average Life (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Combination, Goodwill [Abstract]
Amount of goodwill recorded	$ 25,111	$ 25,111
Finite-Lived Intangible Assets
Total Intangible assets	10,490	10,490
Less accumulated amortization	(6,621)	(5,455)
Intangible assets, net	$ 3,869	$ 5,035
Weighted-average life	3 years 3 months 18 days	4 years 3 months 18 days
Amortization expense	$ 1,200	$ 1,200