Stock-Based Compensation - Changes in the Company's Restricted Stock (Details) - Restricted Stock [Member] shares in Thousands	12 Months Ended
	Feb. 29, 2020 $ / shares shares
Number of Restricted Shares
Unvested shares, beginning of period (in shares) | shares	3,747
Granted (in shares) | shares	896
Vested (in shares) | shares	(1,093)
Forfeited (in shares) | shares	(1,105)
Unvested shares, end of period (in shares) | shares	2,445
Weighted Average Grant-Date Fair Value
Unvested shares, Weighted Average Grant Date Fair Value, beginning of period (in dollars per share) | $ / shares	$ 41.73
Granted, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	13.51
Vested, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	38.57
Forfeited, Weighted Average Grant-Date Fair Value (in dollars per share) | $ / shares	35.76
Unvested shares, Weighted Average Grant Date Fair Value, end of period (in dollars per share) | $ / shares	$ 35.50