Shareholders' (Deficit) Equity - Summary of Changes in Accumulated Other Comprehensive Income (Loss) (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (22,700,000)	$ (44,300,000)	$ (19,794,000)	$ (31,700,000)
Other comprehensive income (loss) before reclassifications, net of tax	(38,800,000)	15,500,000	(42,200,000)	(400,000)
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax	2,700,000	1,400,000	3,200,000	4,700,000
Total other comprehensive (loss) income	(36,128,000)	16,912,000	(38,991,000)	4,324,000
Ending balance	(58,785,000)	(27,400,000)	(58,785,000)	(27,400,000)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(25,400,000)	(46,700,000)	(25,600,000)	(28,800,000)
Other comprehensive income (loss) before reclassifications, net of tax	(39,900,000)	15,000,000	(39,700,000)	(2,900,000)
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax
Total other comprehensive (loss) income	(39,900,000)	15,000,000	(39,700,000)	(2,900,000)
Ending balance	(65,300,000)	(31,700,000)	(65,300,000)	(31,700,000)
Unrealized Gain (Loss) on Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	2,500,000	2,400,000	5,700,000	(2,900,000)
Other comprehensive income (loss) before reclassifications, net of tax	5,700,000	500,000	4,000,000	2,500,000
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax	(1,700,000)	1,400,000	(3,200,000)	4,700,000
Total other comprehensive (loss) income	4,000,000	1,900,000	800,000	7,200,000
Ending balance	6,500,000	4,300,000	6,500,000	4,300,000
Unrealized Gain (Loss) on Available-For-Sale Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	200,000		100,000
Other comprehensive income (loss) before reclassifications, net of tax	(4,600,000)		(6,500,000)
Amounts reclassified from accumulated other comprehensive income (loss) to income, net of tax	4,400,000		6,400,000
Total other comprehensive (loss) income	(200,000)		(100,000)
Ending balance