Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2019	Nov. 24, 2018
Segment Reporting Information [Line Items]
Revenues	$ 465,398	$ 438,550
Operating income (loss)	60,095	50,426
Interest income, net	(2,361)	(1,705)
Income (loss) before taxes	61,928	51,959
U.S. and Canadian Rental and Cleaning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	407,803	380,788
Operating income (loss)	76,287	54,714
Interest income, net	(976)	(1,047)
Income (loss) before taxes	77,257	55,752
MFG | Operating Segments
Segment Reporting Information [Line Items]
Revenues	65,010	67,546
Operating income (loss)	22,546	24,732
Income (loss) before taxes	22,403	24,840
MFG | Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues	(65,010)	(67,546)
Operating income (loss)	(2,526)	(3,747)
Income (loss) before taxes	(2,526)	(3,747)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenues	8,495	9,689
Operating income (loss)	(42,499)	(30,917)
Interest income, net	(1,385)	(658)
Income (loss) before taxes	(41,498)	(30,233)
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues	416,298	390,477
Operating income (loss)	53,808	44,782
Interest income, net	(2,361)	(1,705)
Income (loss) before taxes	55,636	46,612
Specialty Garments
Segment Reporting Information [Line Items]
Revenues	33,402	34,448
Specialty Garments | Operating Segments
Segment Reporting Information [Line Items]
Revenues	33,402	34,448
Operating income (loss)	4,879	4,470
Income (loss) before taxes	4,884	4,173
First Aid
Segment Reporting Information [Line Items]
Revenues	15,698	13,625
First Aid | Operating Segments
Segment Reporting Information [Line Items]
Revenues	15,698	13,625
Operating income (loss)	1,408	1,174
Income (loss) before taxes	$ 1,408	$ 1,174