Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	May 09, 2015
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 65,646
Finite Lived, Accumulated Amortization	(16,166)
Finite Lived, Net Carrying Amount	49,480
Total intangible assets other than goodwill, Net Carrying Amount	76,380
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	10,570
Finite Lived, Accumulated Amortization	(5,071)
Finite Lived, Net Carrying Amount	5,499
Noncompete Agreements [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Finite Lived, Gross Carrying Amount	1,300
Finite Lived, Accumulated Amortization	(623)
Finite Lived, Net Carrying Amount	677
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	53,776
Finite Lived, Accumulated Amortization	(10,472)
Finite Lived, Net Carrying Amount	43,304
Minimum [Member] | Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Minimum [Member] | Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Maximum [Member] | Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Maximum [Member] | Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Trade Name [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Non-amortizing intangible asset - Trade name, Net Carrying Amount	$ 26,900