Assets and liabilities measured at fair value (Detail) $ in Thousands	Aug. 03, 2018 USD ($)
Reported amount | Current portion of long-term debt obligations
Liabilities:
Long-term obligations	$ 1,909
Reported amount | Long-term obligations
Liabilities:
Long-term obligations	2,776,811
Reported amount | Accrued expenses and other current liabilities
Liabilities:
Deferred compensation	2,620
Reported amount | Noncurrent Other liabilities
Liabilities:
Deferred compensation	23,255
Fair value measurements on recurring basis | Balance at the end of the period
Liabilities:
Long-term obligations	2,766,804
Deferred compensation	25,875
Fair value measurements on recurring basis | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Liabilities:
Long-term obligations	2,467,011
Deferred compensation	25,875
Fair value measurements on recurring basis | Significant Other Observable Inputs (Level 2)
Liabilities:
Long-term obligations	$ 299,793