OTHER FINANCIAL INFORMATION (Schedule of Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 28, 2014	May. 31, 2015
Interest expense on convertible senior unsecured notes:
Stated interest at 1.625% per annum	$ 2,268
Amortization of note discount	4,613
Amortization of debt issue costs	588
Interest expense on convertible notes	7,469
Other interest expense	126	$ 296	$ 407
Total interest expense	$ 7,595	$ 296	$ 407
Convertible Senior Notes [Member]
Condensed Income Statements, Captions [Line Items]
Interest rate (as a percent)	1.625%			1.625%