Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 23, 2019	Feb. 24, 2018	Feb. 23, 2019	Feb. 24, 2018
Segment Reporting Information [Line Items]
Revenues	$ 437,485	$ 419,264	$ 876,035	$ 835,042
Operating income (loss)	62,446	41,952	112,872	93,863
Interest income, net	(2,009)	(1,430)	(3,714)	(2,706)
Income (loss) before taxes	63,395	43,568	115,354	96,601
U.S. and Canadian Rental and Cleaning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	385,511	368,386	766,264	733,904
Operating income (loss)	64,619	48,516	119,333	103,314
Interest income, net	(1,058)	(1,094)	(2,105)	(2,043)
Income (loss) before taxes	65,667	49,602	121,419	105,366
MFG | Operating Segments
Segment Reporting Information [Line Items]
Revenues	60,978	59,769	128,524	123,714
Operating income (loss)	20,160	21,994	44,892	45,981
Interest income, net	0	0	0	0
Income (loss) before taxes	19,876	21,974	44,716	45,884
MFG | Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues	(60,961)	(59,738)	(128,472)	(123,657)
Operating income (loss)	1,047	(2,797)	(2,700)	(7,534)
Interest income, net	0	0	0	0
Income (loss) before taxes	1,046	(2,797)	(2,701)	(7,534)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenues	8,880	10,538	18,569	18,790
Operating income (loss)	(26,713)	(29,629)	(57,630)	(57,319)
Interest income, net	(951)	(336)	(1,609)	(663)
Income (loss) before taxes	(26,502)	(29,280)	(56,735)	(56,613)
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues	394,408	378,955	784,885	752,751
Operating income (loss)	59,113	38,084	103,895	84,442
Interest income, net	(2,009)	(1,430)	(3,714)	(2,706)
Income (loss) before taxes	60,087	39,499	106,699	87,103
Specialty Garments
Segment Reporting Information [Line Items]
Revenues	29,745	27,009	64,193	55,436
Specialty Garments | Operating Segments
Segment Reporting Information [Line Items]
Revenues	29,745	27,009	64,193	55,436
Operating income (loss)	2,235	2,800	6,705	7,277
Interest income, net	0	0	0	0
Income (loss) before taxes	2,210	3,001	6,383	7,354
First Aid
Segment Reporting Information [Line Items]
Revenues	13,332	13,300	26,957	26,855
First Aid | Operating Segments
Segment Reporting Information [Line Items]
Revenues	13,332	13,300	26,957	26,855
Operating income (loss)	1,098	1,068	2,272	2,144
Interest income, net	0	0	0	0
Income (loss) before taxes	$ 1,098	$ 1,068	$ 2,272	$ 2,144