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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Benefit from income taxes	$ (10,638)	$ (8,547)	$ (31,158)	$ (23,517)
Net discrete tax (expense) benefit	4,000	4,300	3,800	3,600
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		$ 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		199,400		199,400	$ 195,800
Other noncurrent assets | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DTA - noncurrent		195,500		195,500	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		200
Other noncurrent liabilities | New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
DTL - noncurrent		$ 3,800		$ 3,800	$ 2,200

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