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Business Combinations - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Aug. 31, 2019	Aug. 29, 2020	Aug. 31, 2019
Business Acquisition [Line Items]
Acquisition related costs	$ 600	$ 600
Newmar Corporation
Business Acquisition [Line Items]
Net revenues		2,508,792	$ 2,645,914
Net (loss) income		$ 72,609	$ 101,692
Income per share - basic (in dollars per share)		$ 2.16	$ 3.03
Income per share - diluted (in dollars per share)		$ 2.11	$ 3.02
Acquisition related costs		$ 10,400
Newmar Corporation | Amortization of intangibles (1 year or less useful life)
Business Acquisition [Line Items]
Nonrecurring adjustments		13,610	$ (13,610)
Newmar Corporation | Increase in amortization of intangibles
Business Acquisition [Line Items]
Nonrecurring adjustments		(1,061)	(5,578)
Newmar Corporation | Expenses related to business combination (transaction costs)
Business Acquisition [Line Items]
Nonrecurring adjustments		9,761	(9,950)
Newmar Corporation | Interest to reflect new debt structure
Business Acquisition [Line Items]
Nonrecurring adjustments		(4,356)	(19,155)
Newmar Corporation | Taxes related to the adjustments to the pro forma data and to the income of Newmar
Business Acquisition [Line Items]
Nonrecurring adjustments		$ (2,968)	$ 2,686

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