FINANCING ARRANGEMENTS (Long-term Debt) (Details) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended
	May 31, 2016 USD ($) $ / shares shares	May 31, 2015 USD ($)	Feb. 29, 2016 USD ($)
Debt Instrument [Line Items]
Issuance costs attributable to the liability component		$ 5,276
Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 172,500		$ 172,500
Interest rate (as a percent)	1.625%
Maturity date	May 15, 2020
Conversion rate of shares of common stock	36.2398
Conversion price (in dollars per share) | $ / shares	$ 27.594
Percentage of repurchase price of the principal amount	100.00%
Maximum number of shares of common stock that could be issued, following certain corporate events that occur prior to maturity | shares	2.5
Debt discount to be amortized	$ 27,495	33,600	$ 29,002
Effective interest rate	6.20%
Fair value of the Notes	$ 158,000	$ 138,900