Ratio of Net Funded Debt to Adjusted EBITDA (Detail) - Senior Secured Debt	Jun. 15, 2017
Term Loan | Range One
Debt Instrument [Line Items]
Variable interest rate	2.75%
Term Loan | Range Two
Debt Instrument [Line Items]
Variable interest rate	2.50%
Revolving Loan Facility | Range One
Debt Instrument [Line Items]
Variable interest rate	2.75%
Revolving Loan Facility | Range Three
Debt Instrument [Line Items]
Variable interest rate	2.50%
Revolving Loan Facility | Range Four
Debt Instrument [Line Items]
Variable interest rate	2.25%