Goodwill and Other Intangible Assets - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 25, 2018	Aug. 26, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 21,500	$ 55,302
Total intangible assets and goodwill acquired	34,113	101,450
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 11,707	$ 43,369
Weighted average life	14 years 11 months	14 years 6 months
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 906	$ 2,779
Weighted average life	6 years 1 month	4 years 8 months 12 days