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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2015
Aug. 31, 2014
Accrual for warranty returns        
Beginning balance $ 20,894 $ 19,140 $ 23,553 $ 19,269
Additions to the accrual 13,244 16,828 26,758 29,514
Reductions of the accrual - payments and credits issued (13,341) (13,476) (29,514) (26,291)
Ending balance $ 20,797 22,492 $ 20,797 22,492
Healthy Directions        
Accrual for warranty returns        
Additions to the accrual   3,190   3,190
Reductions of the accrual - payments and credits issued   $ (1,820)   $ (1,820)
Minimum        
Warranties        
Product warranty period     2 years  
Maximum        
Warranties        
Product warranty period     5 years