Summary of Significant Accounting Policies - Schedule of Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 31, 2019	May 25, 2019	Feb. 23, 2019	Nov. 24, 2018	Aug. 25, 2018	May 26, 2018	Feb. 24, 2018	Nov. 25, 2017	Aug. 31, 2019	Aug. 25, 2018	Aug. 26, 2017
Disaggregation of Revenue [Line Items]
Total revenues	$ 479,621	$ 453,720	$ 437,485	$ 438,550	$ 434,063	$ 427,384	$ 419,264	$ 415,778	$ 1,809,376	$ 1,696,489	$ 1,590,958
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									$ 1,616,205	$ 1,523,648	$ 1,442,149
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									89.30%	89.80%	90.60%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues									$ 132,767	$ 118,477	$ 98,024
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									7.30%	7.00%	6.20%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues									$ 60,404	$ 54,364	$ 50,785
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues									3.40%	3.20%	3.20%