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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Benefit from income taxes	$ (20,520)	$ (14,970)
Net discrete tax (expense) benefit	200	700
Reasonably possible changes to unrecognized tax benefits related to settlement of tax audits and/or expiration of statutes of limitations within the next twelve months	$ 10,000
Prepaid expenses and other current assets | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DTA - current		194,900	$ 195,800
Other noncurrent assets | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DTA - noncurrent		191,000	193,600
Accounts Payable and Accrued Liabilities | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DTL - current		200
Other noncurrent liabilities | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DTL - noncurrent		$ (3,700)	$ (2,200)

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