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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended
May. 31, 2015
May. 31, 2014
Accrual for warranty returns    
Beginning balance $ 23,553 $ 19,269
Additions to the accrual 13,514 12,686
Reductions of the accrual - payments and credits issued (16,173) (12,815)
Ending balance 20,894 $ 19,140
Healthy Directions    
Accrual for warranty returns    
Additions to the accrual 2,330  
Reductions of the accrual - payments and credits issued $ (2,390)  
Minimum    
Warranties    
Product warranty period 2 years  
Maximum    
Warranties    
Product warranty period 5 years