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Debt - Term Loan Amendment - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Feb. 23, 2017	Mar. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Unamortized debt discount and debt issuance costs			$ 28,273	$ 29,172
2024 Term Loan
Debt Instrument [Line Items]
Term loan facility amount	$ 467,700
Interest rate reduced due to repricing of term loan credit agreement	0.75%
Senior secured term loan extended maturity period	19 months
Senior secured term loan maturity date	Feb. 29, 2024
Debt instrument interest rate description			The 2024 term loan bears interest based on either a eurodollar or base rate (a rate equal to the highest of an agreed commercially available benchmark rate, the federal funds effective rate plus 0.50% or the eurodollar rate plus 1.0%, as selected by the Company) plus, in each case, an applicable margin.
Write-off of unamortized debt discount and debt issuance cost		$ 400
Lender fees paid in connection with 2024 term loan amendment		1,200
Unamortized debt discount and debt issuance costs		10,000
Debt issuance costs recorded to interest expense		$ 1,400
2024 Term Loan | Federal Funds Effective Rate
Debt Instrument [Line Items]
Debt instrument applicable margin rate	0.50%
2024 Term Loan | Eurodollar Base Rate
Debt Instrument [Line Items]
Debt instrument applicable margin rate	1.00%
2024 Term Loan | Eurodollar Rate
Debt Instrument [Line Items]
Debt instrument applicable margin rate	3.00%
2024 Term Loan | Base Rate
Debt Instrument [Line Items]
Debt instrument applicable margin rate	2.00%

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Debt instrument extended maturity period.

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Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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