Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			$ (949,142)
Net Change	$ 71,415	$ (227,232)	137,821	$ (134,727)
March 31, 2017	(811,321)		(811,321)
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			307,921
March 31, 2017	(723,208)		(723,208)
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			(39,398)
March 31, 2017	(8,694)		(8,694)
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			(330)
March 31, 2017	1,780		1,780
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			(130,398)
March 31, 2017	(80,409)		(80,409)
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			26
March 31, 2017	(790)		(790)
Comprehensive income [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
December 31, 2016			(949,142)
Net Change			137,821
March 31, 2017	$ (811,321)		$ (811,321)