Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 51,450	$ 41,132	$ 65,050	$ 177,043
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment (“CTA”) loss	(32,603)	(72,677)	(215,065)	(149,546)
Unrealized gain (loss) on available-for-sale securities	1,487	(21)	2,382	99
Unrealized gain (loss) on cash flow hedges	(4,153)	3,309	3,789	(425)
Net investment hedge CTA gain (loss)	(34,721)	4,426	4,163	(5,963)
Net actuarial gain on defined benefit plans	7	124	21	266
Total other comprehensive loss, net of tax	(69,983)	(64,839)	(204,710)	(155,569)
Comprehensive income (loss), net of tax	$ (18,533)	$ (23,707)	$ (139,660)	$ 21,474