Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Aug. 29, 2020	Aug. 31, 2019	Sep. 01, 2018	Dec. 31, 2017
Unrecognized tax benefits related to tax positions	$ 1,311
Provision for income taxes, interest and penalties	23	$ 27	$ 44
Accrued interest and penalties on income taxes	$ 585	521
Tax credit carryforward		2,159
Tax credit carryforward, valuation allowance		$ 1,403
U.S. Federal statutory rate	21.00%	21.00%	25.60%	35.00%
Net tax benefit, revaluation of deferred tax liabilities			$ 40,464
Scenario, Plan [Member]
U.S. Federal statutory rate	21.00%

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized.

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