Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Nov. 24, 2018	Aug. 25, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 255,238	$ 255,333
Accumulated Amortization	187,702	184,429
Net Carrying Amount	67,536	70,904
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	220,257	220,303
Accumulated Amortization	155,900	152,985
Net Carrying Amount	64,357	67,318
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	34,981	35,030
Accumulated Amortization	31,802	31,444
Net Carrying Amount	$ 3,179	$ 3,586