Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015			$ (509,059)
Net change	$ (69,983)	$ (64,839)	(204,710)	$ (155,569)
September 30, 2016	(713,769)		(713,769)
Foreign currency translation adjustment (“CTA”) loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015			(523,709)
Net change			(215,065)
September 30, 2016	(738,774)		(738,774)
Unrealized gain on cash flow hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015			11,153
Net change			3,789
September 30, 2016	14,942		14,942
Unrealized gain (loss) on available-for-sale securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015			(139)
Net change			2,382
September 30, 2016	2,243		2,243
Net investment hedge CTA gain
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015			4,484
Net change			4,163
September 30, 2016	8,647		8,647
Net actuarial gain (loss) on defined benefit plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015			(848)
Net change			21
September 30, 2016	$ (827)		$ (827)