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Revenue Recognition - Schedule of Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 23, 2019	Feb. 29, 2020	Feb. 23, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 464,600	$ 437,485	$ 929,998	$ 876,035
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	$ 412,192	$ 394,408	$ 828,490	$ 784,885
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	88.70%	90.20%	89.10%	89.60%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues	$ 35,980	$ 29,745	$ 69,382	$ 64,193
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	7.70%	6.80%	7.50%	7.30%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues	$ 16,428	$ 13,332	$ 32,126	$ 26,957
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	3.50%	3.00%	3.50%	3.00%

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