Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Income (Loss) Reclassified (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		$ (116,690)	$ (33,492)	$ (97,808)	$ (47,710)
Other comprehensive income (loss) before reclassification		5,337	(467)	(33,383)	11,547
Amounts reclassified from AOCI		17,329	293	37,167	2,497
Net current period other comprehensive income (loss)		22,666	(174)	3,784	14,044
Ending Balance		(94,024)	(33,666)	(94,024)	(33,666)
Foreign currency gain (loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		(17,254)	(2,882)	(15,212)	(2,562)
Other comprehensive income (loss) before reclassification		(2,701)	(939)	(4,743)	(1,259)
Amounts reclassified from AOCI		(2,243)		(2,243)
Net current period other comprehensive income (loss)		(4,944)	(939)	(6,986)	(1,259)
Ending Balance		(22,198)	(3,821)	(22,198)	(3,821)
Unrealized holding loss on investment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance		253	214	241	238
Other comprehensive income (loss) before reclassification		4	31	16	7
Net current period other comprehensive income (loss)		4	31	16	7
Ending Balance		257	245	257	245
Deferred gain (loss) on derivatives [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	[1]	(99,689)	(30,824)	(82,837)	(45,386)
Other comprehensive income (loss) before reclassification	[1]	8,034	441	(28,656)	12,799
Amounts reclassified from AOCI	[1]	19,572	293	39,410	2,497	[2]
Net current period other comprehensive income (loss)	[1]	27,606	734	10,754	15,296
Ending Balance	[1]	$ (72,083)	$ (30,090)	$ (72,083)	$ (30,090)

[1] Refer to Note 9 for additional details.

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