Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) $ in Thousands	3 Months Ended
	Nov. 19, 2016 USD ($)
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 61,546
Finite Lived, Accumulated Amortization	(29,483)
Finite Lived, Net Carrying Amount	32,063
Total intangible assets other than goodwill, Net Carrying Amount	58,963
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	10,570
Finite Lived, Accumulated Amortization	(8,502)
Finite Lived, Net Carrying Amount	$ 2,068
Technology [Member] | Minimum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Technology [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
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	(1,023)
Finite Lived, Net Carrying Amount	277
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	49,676
Finite Lived, Accumulated Amortization	(19,958)
Finite Lived, Net Carrying Amount	$ 29,718
Customer Relationships [Member] | Minimum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Customer Relationships [Member] | Maximum [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Trade Names [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Non-amortizing intangible asset - Trade name, Net Carrying Amount	$ 26,900