Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Aug. 29, 2020	Aug. 31, 2019
Income Taxes [Abstract]
Deferred tax liabilities: Depreciation	$ (41,049)	$ (40,602)
Deferred tax liabilities: Deferred catalog costs		(546)
Deferred tax liabilities: Right of use asset	(14,260)
Deferred tax liabilities: Goodwill	(96,303)	(86,707)
Deferred tax liabilities: Intangible amortization	(1,478)	(143)
Deferred tax liabilities	(153,090)	(127,998)
Deferred tax assets: Accounts receivable	4,109	3,823
Deferred tax assets: Lease liability	14,231
Deferred tax assets: Inventory	8,430	6,529
Deferred tax assets: Deferred compensation	753	853
Deferred tax assets: Stock-based compensation	6,224	5,887
Deferred tax assets: Foreign Tax Credit	2,159	2,712
Less: Valuation Allowance	(1,403)	(1,762)
Deferred tax assets: Other accrued expenses/reserves	8,440	8,164
Deferred tax assets	42,943	26,206
Net Deferred Tax Liabilities	$ (110,147)	$ (101,792)