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Long-Term Debt and Short-Term Debt - Summary of Long-Term Debt and Short-Term Debt (Parenthetical) (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt issuance costs	$ 248,800,000
Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Borrowings	$ 250,000,000
Interest rate	10.25%
Debt maturity date	Nov. 01, 2020
Debt issuance costs	$ 5,400,000	$ 5,900,000
Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Borrowings	$ 575,000,000
Interest rate	0.65%
Applicable margin	4.75%
Debt issuance costs	$ 19,500,000	20,600,000
LIBOR Period	3 months
Debt maturity date	Oct. 19, 2022
Senior Secured Term Loan B [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate	1.00%
Senior Secured Revolving Facility [Member]
Debt Instrument [Line Items]
Debt issuance costs	$ 2,600,000	$ 2,900,000
Borrowings	$ 100,000,000
Debt maturity date	Oct. 19, 2020
Senior Secured Revolving Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate	0.44%
Applicable margin	3.50%

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+ References

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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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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