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Fair Value Measurements - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Fair value of fixed-rate debt	$ 263,800,000	$ 263,800,000
Debt issuance costs	258,600,000	258,600,000
Amount of interest rate swap	$ 150,000,000	$ 150,000,000
Description of term of interest rate swap		Our $150 million interest rate swap went into effect on December 29, 2015, at which time our interest rate was effectively 6.966%.
Locked interest rate	6.966%	6.966%
Derivative maturity date		Dec. 31, 2018
Derivative inception date		Dec. 29, 2015
Derivative in Net liability position	$ 3,900,000	$ 3,900,000
Gain or loss related to interest rate swaps	600,000	1,400,000	$ (3,015,000)
Interest Rate cash flow hedge liability at fair value	150,000,000	150,000,000
Gain or loss related to interest rate swaps		300,000
Amount to be reclassified from accumulated and other comprehensive income in next twelve months	0	0
Cash payments related to the interest rates swap		1,900,000
Accumulated Other Comprehensive Income (Loss) [Member]
Derivatives, Fair Value [Line Items]
Gain or loss related to interest rate swaps		0
Senior Secured Term Loan B [Member]
Derivatives, Fair Value [Line Items]
Debt issuance costs	$ 21,100,000	$ 21,100,000	$ 20,600,000
Interest rate	0.75%	0.75%
Minimum [Member] | Senior Secured Term Loan B [Member]
Derivatives, Fair Value [Line Items]
Interest rate	0.75%	0.75%
Minimum [Member] | Senior Secured Term Loan B [Member] | Benchmark [Member]
Derivatives, Fair Value [Line Items]
Interest rate	0.75%	0.75%
Maximum [Member] | Senior Secured Term Loan B [Member] | Benchmark [Member]
Derivatives, Fair Value [Line Items]
Interest rate	1.00%	1.00%

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- Definition

Cash settlement of interest rate hedges.

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Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

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Description of the relevant terms of the derivative. Includes the type of instrument, risk being hedged, notional amount, counterparty, inception date, maturity date, relevant interest rates, strike price, cap price, and floor price.

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Fixed interest rate related to the interest rate derivative.

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Date the entity entered into the derivative contract, in CCYY-MM-DD format.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
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Date the derivative contract matures, in CCYY-MM-DD format.

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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
-Subparagraph (c)
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The net gain (loss) recognized in earnings during the period due to the ineffectiveness on interest rate fair value hedges.

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-Name Accounting Standards Codification
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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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-Paragraph 4B
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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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