Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Nov. 25, 2017	Aug. 26, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 243,805	$ 242,960
Accumulated Amortization	174,349	171,216
Net Carrying Amount	69,456	71,744
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	209,221	208,711
Accumulated Amortization	143,996	141,226
Net Carrying Amount	65,225	67,485
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	34,584	34,249
Accumulated Amortization	30,353	29,990
Net Carrying Amount	$ 4,231	$ 4,259