Goodwill and Other Intangible Assets - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Aug. 25, 2018	Aug. 26, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 255,333	$ 242,960
Accumulated Amortization	184,429	171,216
Net Carrying Amount	70,904	71,744
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	220,303	208,711
Accumulated Amortization	152,985	141,226
Net Carrying Amount	67,318	67,485
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	35,030	34,249
Accumulated Amortization	31,444	29,990
Net Carrying Amount	$ 3,586	$ 4,259