Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
May 29, 2021	May 30, 2020	Feb. 27, 2021
Income Taxes
Income tax (benefit) expense	$ 780	$ (8,018)
Estimated effective tax rate (as a percent)	(6.40%)	(9.90%)
Increase in valuation allowance to offset the current year deferred state tax benefits (as a percent)	(18.50%)	(10.60%)
Decrease in unrecognized tax benefits related to state exposures	$ 11,851
Valuation allowance against net deferred tax assets	$ 1,660,547		$ 1,657,562

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

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