Stock Options and Stock Awards- Restricted Stock, etc. (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Feb. 29, 2020	Mar. 02, 2019	Mar. 03, 2018
Additional General Disclosures
Stock-based compensation costs	$ 16,087	$ 12,115	$ 25,793
Restricted shares
Stock options and stock award Plans
Vesting period	3 years
Restricted stock, Shares activity
Outstanding at the beginning of the period (in shares)	1,008	611	291
Granted (in shares)	1,402	700	693
Vested (in shares)	(695)	(215)	(194)
Cancelled (in shares)	(462)	(88)	(179)
Outstanding at the end of the period (in shares)	1,253	1,008	611
Restricted stock, Fair value
Outstanding at the beginning of the period (in dollars per share)	$ 28.60	$ 66.34	$ 157.35
Granted (in dollars per share)	8.40	16.05	56.44
Vested (in dollars per share)	28.59	76.99	160.61
Cancelled (in dollars per share)	16.76	72.87	73.95
Outstanding at the end of the period (in dollars per share)	$ 10.32	$ 28.60	$ 66.34
Unrecognized pre-tax compensation costs related to unvested stock options and restricted stock grants
Unrecognized pre-tax costs	$ 10,396
Weighted average amortization period	1 year 10 months 28 days
Restricted stock, Additional disclosures
Total fair value of awards vested during the period	$ 19,846	$ 16,519	$ 31,125
Performance based awards
Additional General Disclosures
Stock-based compensation costs	$ (461)	$ (1,084)	$ 4,122