Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			$ (949,142)
Net Change	$ 27,374	$ (69,983)	165,195	$ (204,710)
September 30, 2017	(783,947)		(783,947)
Foreign currency translation adjustment (“CTA”) gain (loss) [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			(1,031,129)
Net Change			408,830
September 30, 2017	(622,299)		(622,299)
Unrealized gain (loss) on cash flow hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			30,704
Net Change			(52,468)
September 30, 2017	(21,764)		(21,764)
Unrealized gain (loss) on available-for-sale securities [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			2,110
Net Change			(85)
September 30, 2017	2,025		2,025
Net investment hedge CTA gain (loss) [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			49,989
Net Change			(191,121)
September 30, 2017	(141,132)		(141,132)
Net actuarial gain (loss) on defined benefit plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			(816)
Net Change			39
September 30, 2017	(777)		(777)
Comprehensive income [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			(949,142)
Net Change			165,195
September 30, 2017	$ (783,947)		$ (783,947)