Revenue Recognition - Schedule of Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 27, 2021	Nov. 28, 2020
Disaggregation of Revenue [Line Items]
Total revenues	$ 486,164	$ 446,853
Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	100.00%	100.00%
Core Laundry Operations
Disaggregation of Revenue [Line Items]
Total revenues	$ 428,846	$ 393,190
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	88.20%	88.00%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues	$ 39,484	$ 38,134
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	8.10%	8.50%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues	$ 17,834	$ 15,529
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	3.70%	3.50%