Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015	$ (509,059)
Net Change	92,505	$ (135,593)
March 31, 2016	(416,554)
Foreign currency translation adjustment ("CTA") gain (loss) [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015	(523,709)
Net Change	115,899
March 31, 2016	(407,810)
Unrealized gain (loss) on cash flow hedges [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015	11,153
Net Change	(6,784)
March 31, 2016	4,369
Unrealized gain (loss) on available for sale securities [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015	(139)
Net Change	(304)
March 31, 2016	(443)
Net investment hedge CTA loss [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015	4,484
Net Change	(16,312)
March 31, 2016	(11,828)
Defined benefit plans [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2015	(848)
Net Change	6
March 31, 2016	$ (842)