Goodwill and Other Intangible Assets - Schedule of Changes in Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 29, 2020	Aug. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 23,544	$ 3,885
Total intangible assets and goodwill acquired	36,835	5,073
Customer contracts
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 12,697	$ 1,070
Weighted average life	14 years 1 month 6 days	10 years
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 594	$ 118
Weighted average life	5 years 3 months 18 days	3 years