Summary of Significant Accounting Policies - Schedule of Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 29, 2020	May 30, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	May 25, 2019	Feb. 23, 2019	Nov. 24, 2018	Aug. 29, 2020	Aug. 31, 2019	Aug. 25, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 428,643	$ 445,518	$ 464,600	$ 465,398	$ 479,621	$ 453,720	$ 437,485	$ 438,550	$ 1,804,159	$ 1,809,376	$ 1,696,489
Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									100.00%	100.00%	100.00%
Core Laundry Operations
Disaggregation of Revenue [Line Items]
Total revenues									$ 1,601,485	$ 1,616,205	$ 1,523,648
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									88.80%	89.30%	89.80%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues									$ 133,185	$ 132,767	$ 118,477
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									7.40%	7.30%	7.00%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues									$ 69,489	$ 60,404	$ 54,364
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									3.90%	3.40%	3.20%