Revenue Recognition - Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 24, 2018	Nov. 25, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 438,550	$ 415,778
Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	100.00%	100.00%
Core Laundry Operations
Disaggregation of Revenue [Line Items]
Total revenues	$ 390,477	$ 373,796
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	89.00%	89.90%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues	$ 34,448	$ 28,427
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	7.90%	6.80%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues	$ 13,625	$ 13,555
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	3.10%	3.30%