Intangibles and Other Assets, Net - Identifiable Intangible and Other Assets (Detail) - USD ($) $ in Thousands	Nov. 30, 2019	Sep. 01, 2019	Aug. 31, 2019
Intangibles and Other Assets by Major Class [Line Items]
Finite-Lived Intangible Assets, Net, Total	$ 65,313		$ 67,995
Intangible assets not subject to amortization	5,273		5,450
Prepaid and other assets	15,038		15,749
Operating lease ROU assets	37,229	$ 40,400
Nonqualified savings plan investments	31,248		27,967
Revolving notes issuance costs, net	4,338		4,568
Assets held for sale	3,650		3,650
Total Intangible and other assets, net	162,089		125,379
Customer Relationships
Intangibles and Other Assets by Major Class [Line Items]
Finite lived intangible assets gross	89,722		89,722
Accumulated amortization	(50,782)		(48,850)
Other Intangible Assets
Intangibles and Other Assets by Major Class [Line Items]
Finite lived intangible assets gross	33,904		34,031
Accumulated amortization	$ (7,531)		$ (6,908)