Revenue Recognition - Schedule of Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 28, 2020	Nov. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 446,853	$ 465,398
Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	100.00%	100.00%
Core Laundry Operations
Disaggregation of Revenue [Line Items]
Total revenues	$ 393,190	$ 416,298
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	88.00%	89.40%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues	$ 38,134	$ 33,402
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	8.50%	7.20%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues	$ 15,529	$ 15,698
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	3.50%	3.40%