CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net change in fair value of cash flow hedges, tax	$ (9)	$ (7)	$ (18)	$ (31)
Reclassification of unrealized losses on cash flow hedges to net income, tax	20	36	66	132
Foreign currency translation adjustments, tax	$ 12,863	$ 7,969	$ 25,275	$ 8,333