Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 04, 2013
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 58,700
Accumulated Amortization	(1,543)
Net Carrying Amount	57,157
Tradename [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,700
Net Carrying Amount	28,700
Estimated Useful Life	Indefinite
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	9,700
Accumulated Amortization	(729)
Net Carrying Amount	8,971
Noncompete agreement [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Gross Carrying Amount	1,300
Accumulated Amortization	(98)
Net Carrying Amount	1,202
Customer relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Gross Carrying Amount	19,000
Accumulated Amortization	(716)
Net Carrying Amount	$ 18,284