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Warranty
 9 Months Ended
Feb. 29, 2012
Warranty and Commitments and Contingencies [Abstract]  
Warranty

NOTE 4 Warranty

A reconciliation of accrued warranty and related expenses is as follows:

 

                 
    Nine-Months Ended  
    February 29,     February 28,  
    2012     2011  
    (Dollars in thousands)  

Balance at the beginning of the period

   $ 4,966     $ 4,839  

Accruals for warranties

     4,429       3,692  

Settlements made during the period

     (3,906 )      (3,707 ) 
   

 

 

    

 

 

  

Balance at the end of the period

     5,489       4,824  
     

Non-current balance included in other deferred liabilities

     1,600       1,500  
   

 

 

    

 

 

  

Accrued warranty and related expenses

   $ 3,889     $ 3,324