COMPREHENSIVE INCOME - Schedule of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Equity [Abstract]
Net income	$ 3,159	$ 20,144	$ 20,388	$ 46,316
Foreign currency translation adjustment	10,175	2,914	33,724	7,589
Change in unrealized gain (loss) on derivatives, net of tax	207	354	(331)	9
Pension liability adjustment, net of tax	(7)	(2)	(22)	(6)
Comprehensive income, net	$ 13,534	$ 23,410	$ 53,759	$ 53,908