Recapitalization - Additional Information (Detail) - 2017 Recapitalization [Member] - USD ($)	Jul. 24, 2017	Jun. 18, 2017
2017 Notes [Member]
Debt Instrument [Line Items]
Scheduled principal payments in year 2017		$ 4,800,000
Scheduled principal payments in year 2018		19,000,000
Scheduled principal payments in year 2019		19,000,000
Scheduled principal payments in year 2020		19,000,000
Scheduled principal payments in year 2021		19,000,000
Scheduled principal payments in year 2022		871,800,000
Scheduled principal payments in year 2023		10,000,000
Scheduled principal payments in year 2024		10,000,000
Scheduled principal payments in year 2025		10,000,000
Scheduled principal payments in year 2026		10,000,000
Scheduled principal payments in year 2027		$ 907,500,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Debt instrument interest rate description	The interest rate on the Floating Rate Notes will be payable at a rate equal to LIBOR plus 125 basis points.
Gross proceeds from the issuance of debt	$ 1,900,000,000
Subsequent Event [Member] \| Class A-2-I, Series 2017-1 Floating Rate Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument face amount	$ 300,000,000
Debt instrument, term	5 years
Subsequent Event [Member] \| Class A-2-I, Series 2017-1 Floating Rate Senior Secured Notes [Member] \| Libor Rate [Member]
Debt Instrument [Line Items]
Interest rate spread	1.25%
Subsequent Event [Member] \| Class A-2-II, Series 2017-1 3.082% Fixed Rate Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument face amount	$ 600,000,000
Debt instrument, term	5 years
Debt instrument, stated percentage	3.082%
Subsequent Event [Member] \| Class A-2-III, Series 2017-1 4.118% Fixed Rate Senior Secured Notes [Member]
Debt Instrument [Line Items]
Debt instrument face amount	$ 1,000,000,000
Debt instrument, term	10 years
Debt instrument, stated percentage	4.118%
Subsequent Event [Member] \| 2017 Variable Funding Notes [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Variable funding notes	$ 175,000,000

Long term debt maturities repayments of principal in year eight.

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Long Term Debt Maturities Repayments Of Principal In Year Eleven

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Long term debt maturities repayments of principal in year nine.

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Long term debt maturities repayments of principal in year seven.

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Long term debt maturities repayments of principal in year six.

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Long term debt maturities repayments of principal in year ten.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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