Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Feb. 24, 2018	Aug. 26, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 250,110	$ 242,960
Accumulated Amortization	177,673	171,216
Net Carrying Amount	72,437	71,744
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	215,233	208,711
Accumulated Amortization	146,900	141,226
Net Carrying Amount	68,333	67,485
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	34,877	34,249
Accumulated Amortization	30,773	29,990
Net Carrying Amount	$ 4,104	$ 4,259