Assets and liabilities measured at fair value (Detail) $ in Thousands	Aug. 04, 2017 USD ($)
Reported amount | Current portion of long-term debt obligations
Liabilities:
Long-term obligations	$ 401,402
Reported amount | Long-term obligations
Liabilities:
Long-term obligations	2,683,105
Reported amount | Accrued expenses and other current liabilities
Liabilities:
Deferred compensation	1,257
Reported amount | Noncurrent Other liabilities
Liabilities:
Deferred compensation	21,360
Fair value measurements on recurring basis | Balance at the end of the period
Liabilities:
Long-term obligations	3,180,696
Deferred compensation	22,617
Fair value measurements on recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Liabilities:
Long-term obligations	2,476,316
Deferred compensation	22,617
Fair value measurements on recurring basis | Significant Other Observable Inputs (Level 2)
Liabilities:
Long-term obligations	$ 704,380