ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Changes in Accumulated Other Comprehensive Income (Loss) Included Within Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Tax Provision
Balance, beginning of period	$ 5,183	$ 2,284
Other comprehensive income (loss) before tax	(1,151)	986
Non-controlling interest	0	0
Balance, end of period	4,032	3,270
Total
Balance, beginning of period	338,146	339,107
Balance, end of period	549,184	319,086
Foreign Currency Translation Adjustments
Before Tax
Balance, beginning of period	(28,124)	(13,718)
Other comprehensive income (loss) before tax	6,226	(7,749)
Non-controlling interest	0	17
Balance, end of period	(21,898)	(21,450)
Foreign Currency Hedge
Before Tax
Balance, beginning of period	4,567	3,028
Other comprehensive income (loss) before tax	(553)	1,607
Non-controlling interest	0	0
Balance, end of period	4,014	4,635
Total
Total
Balance, beginning of period	(18,374)	(8,406)
Other comprehensive income (loss) before tax	4,522	(5,156)
Non-controlling interest	0	17
Balance, end of period	$ (13,852)	$ (13,545)