Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) Reclassified (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (94,024)	$ (33,666)	$ (97,808)	$ (47,710)
Other comprehensive (loss) before reclassification		(37,609)	(41,025)	(70,992)	(29,478)
Amounts reclassified from AOCI		27,548	6,650	64,715	9,147
Net current period other comprehensive loss		(10,061)	(34,375)	(6,277)	(20,331)
Ending Balance		(104,085)	(68,041)	(104,085)	(68,041)
Foreign currency gain (loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(22,198)	(3,821)	(15,212)	(2,562)
Other comprehensive (loss) before reclassification		(9,333)	(1,455)	(14,076)	(2,714)
Amounts reclassified from AOCI				(2,243)
Net current period other comprehensive loss		(9,333)	(1,455)	(16,319)	(2,714)
Ending Balance		(31,531)	(5,276)	(31,531)	(5,276)
Unrealized holding loss on investment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		257	245	241	238
Other comprehensive (loss) before reclassification		(27)	(7)	(11)
Net current period other comprehensive loss		(27)	(7)	(11)
Ending Balance		230	238	230	238
Deferred gain (loss) on derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(72,083)	(30,090)	(82,837)	(45,386)
Other comprehensive (loss) before reclassification	[1]	(28,249)	(39,563)	(56,905)	(26,764)
Amounts reclassified from AOCI	[1],[2]	27,548	6,650	66,958	9,147
Net current period other comprehensive loss	[1]	(701)	(32,913)	10,053	(17,617)
Ending Balance	[1]	$ (72,784)	$ (63,003)	$ (72,784)	$ (63,003)

[1] Refer to Note 9 for additional details.

[2] Reclassified to cost of operations and gain on foreign currency, net.