COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
October 1, 2017 through December 31, 2017	$ 1,341		$ 1,341
2018	4,757		4,757
2019	4,245		4,245
2020	3,829		3,829
2021	3,139		3,139
2022 and thereafter	8,727		8,727
Total minimum payments	26,038		26,038
Operating Leases, Rent Expense, Net [Abstract]
Rent expense	1,200	$ 1,100	3,600	$ 3,400
Change in accrual for unrecognized tax benefits	$ 2,300		$ 2,358	$ 166