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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
May 31, 2014
May 31, 2013
Accrual for warranty returns    
Beginning balance $ 19,269 $ 23,150
Additions to the accrual 13,286 13,578
Reductions of the accrual - payments and credits issued (13,415) (15,946)
Ending balance $ 19,140 $ 20,782
Minimum
   
Warranties    
Product warranty period 2 years  
Maximum
   
Warranties    
Product warranty period 5 years