Goodwill and Intangibles - Schedule of Carrying Amounts of Intangible Assets (Detail) $ in Thousands	3 Months Ended
	Nov. 21, 2015 USD ($)
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	$ 61,546
Finite Lived, Accumulated Amortization	(20,735)
Finite Lived, Net Carrying Amount	40,811
Total intangible assets other than goodwill, Net Carrying Amount	67,711
Technology [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	10,570
Finite Lived, Accumulated Amortization	(6,272)
Finite Lived, Net Carrying Amount	$ 4,298
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	(763)
Finite Lived, Net Carrying Amount	537
Customer Relationships [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Finite Lived, Gross Carrying Amount	49,676
Finite Lived, Accumulated Amortization	(13,700)
Finite Lived, Net Carrying Amount	$ 35,976
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 Name [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Non-amortizing intangible asset - Trade name, Net Carrying Amount	$ 26,900