Ratio of Net Funded Debt to Adjusted EBITDA (Parenthetical) (Detail) - Senior Secured Debt	Jun. 15, 2017
Term Loan | Range One | Minimum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	250.00%
Term Loan | Range Two | Maximum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	250.00%
Revolving Loan Facility | Range One | Minimum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	425.00%
Revolving Loan Facility | Range Three | Minimum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	375.00%
Revolving Loan Facility | Range Three | Maximum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	425.00%
Revolving Loan Facility | Range Four | Maximum
Debt Instrument [Line Items]
Ratio of Funded Debt to Adjusted EBITDA	375.00%