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CONVERTIBLE SENIOR UNSECURED NOTES (Tables)
6 Months Ended
Aug. 31, 2017
Debt Disclosure [Abstract]  
Schedule of Balances Attributable to the Notes

Balances attributable to the Notes consist of the following (in thousands):

August 31, February 28,
      2017       2017
Principal $ 172,500 $ 172,500
Less: Unamortized debt discount (19,507 ) (22,770 )
           Unamortized debt issuance costs (2,487 ) (2,903 )
Net carrying amount of the Notes $       150,506 $         146,827