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FINANCING ARRANGEMENTS AND CONTRACTUAL CASH OBLIGATIONS (Contractual Cash Obligations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2015
May 31, 2015
Total contractual obligations        
Rent expense under operating leases $ 6,994 $ 2,179 $ 2,146  
Other Contractual Commitments [Member]        
Commitments        
2018 2,115      
2019      
2020      
2021      
2022      
Thereafter      
Total 2,115      
Operating leases        
2018 6,815      
2019 5,311      
2020 3,403      
2021 1,748      
2022 1,112      
Thereafter 2,799      
Total 21,188      
Purchase obligations        
2018 23,420      
2019      
2020      
2021      
2022      
Thereafter      
Total 23,420      
Total contractual obligations        
2018 35,153      
2019 8,114      
2020 6,206      
2021 175,650      
2022 1,112      
Thereafter 2,799      
Total 229,034      
Convertible Senior Notes [Member]        
Debt        
2018      
2019      
2020      
2021 172,500      
2022      
Thereafter      
Total 172,500 $ 172,500   $ 172,500
Commitments        
2018 2,803      
2019 2,803      
2020 2,803      
2021 1,402      
2022      
Thereafter      
Total $ 9,811