Business Combinations - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Nov. 28, 2020	Nov. 30, 2019
Business Acquisition [Line Items]
Net income	$ 57,423	$ 14,068
Newmar
Business Acquisition [Line Items]
Net revenues	793,131	741,717
Net income	$ 57,423	$ 17,197
Income per share - basic (in dollars per share)	$ 1.71	$ 0.51
Income per share - diluted (in dollars per share)	$ 1.70	$ 0.50
Newmar | Amortization of intangibles (1 year or less useful life)
Business Acquisition [Line Items]
Net income		$ 2,251
Newmar | Amortization of intangibles
Business Acquisition [Line Items]
Net income		(1,057)
Newmar | Expenses related to business combination (transaction costs)
Business Acquisition [Line Items]
Net income		9,950
Newmar | Interest to reflect new debt structure
Business Acquisition [Line Items]
Net income		(3,367)
Newmar | Taxes related to the adjustments to the pro forma data and to the income of Newmar
Business Acquisition [Line Items]
Net income		$ (832)