Revenue Recognition - Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 25, 2019	May 26, 2018	May 25, 2019	May 26, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 453,720	$ 427,384	$ 1,329,755	$ 1,262,426
Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	100.00%	100.00%	100.00%	100.00%
Core Laundry Operations
Disaggregation of Revenue [Line Items]
Total revenues	$ 399,781	$ 379,071	$ 1,184,666	$ 1,131,822
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	88.10%	88.70%	89.10%	89.70%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues	$ 37,313	$ 34,060	$ 101,506	$ 89,496
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	8.20%	8.00%	7.60%	7.10%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues	$ 16,626	$ 14,253	$ 43,583	$ 41,108
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	3.70%	3.30%	3.30%	3.20%