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Warranties (Tables)
3 Months Ended
Nov. 30, 2011
Warranties [Abstract]  
Schedule Of Product Warranty Liability
September 30, September 30,
       Three months ended  
       November 30,  

$ in thousands

     2011      2010  

Warranties:

       

Product warranty accrual balance, beginning of period

     $ 3,651       $ 1,862   

Liabilities accrued for warranties during the period

       899         842   

Warranty claims paid during the period

       (805      (908
    

 

 

    

 

 

 

Product warranty accrual balance, end of period

     $ 3,745       $ 1,796