Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 28, 2020	Nov. 30, 2019
Segment Reporting Information [Line Items]
Revenues	$ 446,853	$ 465,398
Operating income (loss)	56,042	60,095
Interest income, net	(568)	(2,361)
Income (loss) before taxes	55,861	61,928
U.S. and Canadian Rental and Cleaning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	386,158	407,803
Operating income (loss)	74,840	76,287
Interest income, net	(693)	(976)
Income (loss) before taxes	75,542	77,257
MFG | Operating Segments
Segment Reporting Information [Line Items]
Revenues	59,082	65,010
Operating income (loss)	19,810	22,546
Income (loss) before taxes	19,674	22,403
MFG | Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues	(59,082)	(65,010)
Operating income (loss)	(994)	(2,526)
Income (loss) before taxes	(994)	(2,526)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenues	7,032	8,495
Operating income (loss)	(44,786)	(42,499)
Interest income, net	125	(1,385)
Income (loss) before taxes	(45,383)	(41,498)
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues	393,190	416,298
Operating income (loss)	48,870	53,808
Interest income, net	(568)	(2,361)
Income (loss) before taxes	48,839	55,636
Specialty Garments
Segment Reporting Information [Line Items]
Revenues	38,134	33,402
Specialty Garments | Operating Segments
Segment Reporting Information [Line Items]
Revenues	38,134	33,402
Operating income (loss)	7,159	4,879
Income (loss) before taxes	7,008	4,884
First Aid
Segment Reporting Information [Line Items]
Revenues	15,529	15,698
First Aid | Operating Segments
Segment Reporting Information [Line Items]
Revenues	15,529	15,698
Operating income (loss)	13	1,408
Income (loss) before taxes	$ 14	$ 1,408