Income Taxes (Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Aug. 28, 2021	Aug. 29, 2020
Income Taxes [Abstract]
Deferred tax liabilities: Depreciation	$ (38,825)	$ (41,049)
Deferred tax liabilities: Right-of-use assets	(10,998)	(14,260)
Deferred tax liabilities: Goodwill	(105,203)	(96,303)
Deferred tax liabilities: Intangible amortization	(2,667)	(1,478)
Deferred tax liabilities	(157,693)	(153,090)
Deferred tax assets: Accounts receivable	4,154	4,109
Deferred tax assets: Lease liability	10,767	14,231
Deferred tax assets: Inventory	16,194	8,430
Deferred tax assets: Self-insurance liability	1,859
Deferred tax assets: Deferred compensation	328	753
Deferred tax assets: Stock-based compensation	6,295	6,224
Deferred tax assets: Foreign tax credit	2,204	2,159
Less: valuation allowance	(826)	(1,403)
Deferred tax assets: Other accrued expenses/reserves	13,681	8,440
Deferred tax assets	54,656	42,943
Net Deferred Tax Liabilities	$ (103,037)	$ (110,147)