EMPLOYEE BENEFIT PLAN (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
EMPLOYEE BENEFIT PLAN
Matching contribution by employer	100.00%	100.00%	100.00%
Percentage of participant's salary matched by employer	6.00%	6.00%	6.00%
Compensation expense in connection with the 401 (k) Plan (in dollars)	$ 2.1	$ 0.8	$ 0.5