Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Nov. 30, 2019	Dec. 01, 2018	Nov. 30, 2019	Dec. 01, 2018	Mar. 02, 2019
Income Taxes
Income tax expense (benefit)	$ 876	$ (1,471)	$ 35,878	$ (117,527)
Estimated effective tax rate (as a percent)	1.60%	7.90%	(39.90%)	22.20%
Increase in valuation allowance to offset the current year deferred state tax benefits (as a percent)	(31.80%)	(9.50%)	(61.00%)	(4.10%)
Decrease in unrecognized tax benefits related to state exposures	$ 7,448		$ 7,448
Valuation allowance against net deferred tax assets	$ 1,071,001		$ 1,071,001		$ 1,091,416

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

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