Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 23, 2019	Feb. 29, 2020	Feb. 23, 2019
Segment Reporting Information [Line Items]
Revenues	$ 464,600	$ 437,485	$ 929,998	$ 876,035
Operating income (loss)	44,127	62,446	104,222	112,872
Interest income, net	(2,175)	(2,009)	(4,536)	(3,714)
Income (loss) before taxes	45,763	63,395	107,691	115,354
U.S. and Canadian Rental and Cleaning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	403,161	385,528	810,964	766,316
Operating income (loss)	59,008	64,619	135,295	119,333
Interest income, net	(1,124)	(1,058)	(2,100)	(2,105)
Income (loss) before taxes	60,119	65,667	137,376	121,419
MFG | Operating Segments
Segment Reporting Information [Line Items]
Revenues	53,661	60,978	118,671	128,524
Operating income (loss)	16,714	20,160	39,260	44,892
Income (loss) before taxes	16,646	19,876	39,049	44,716
MFG | Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues	(53,661)	(60,978)	(118,671)	(128,524)
Operating income (loss)	3,093	1,047	567	(2,700)
Income (loss) before taxes	3,093	1,046	567	(2,701)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenues	9,031	8,880	17,526	18,569
Operating income (loss)	(40,458)	(26,713)	(82,957)	(57,630)
Interest income, net	(1,051)	(951)	(2,436)	(1,609)
Income (loss) before taxes	(39,811)	(26,502)	(81,309)	(56,735)
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues	412,192	394,408	828,490	784,885
Operating income (loss)	38,357	59,113	92,165	103,895
Interest income, net	(2,175)	(2,009)	(4,536)	(3,714)
Income (loss) before taxes	40,047	60,087	95,683	106,699
Specialty Garments
Segment Reporting Information [Line Items]
Revenues	35,980	29,745	69,382	64,193
Specialty Garments | Operating Segments
Segment Reporting Information [Line Items]
Revenues	35,980	29,745	69,382	64,193
Operating income (loss)	4,627	2,235	9,506	6,705
Income (loss) before taxes	4,573	2,210	9,457	6,383
First Aid
Segment Reporting Information [Line Items]
Revenues	16,428	13,332	32,126	26,957
First Aid | Operating Segments
Segment Reporting Information [Line Items]
Revenues	16,428	13,332	32,126	26,957
Operating income (loss)	1,143	1,098	2,551	2,272
Income (loss) before taxes	$ 1,143	$ 1,098	$ 2,551	$ 2,272