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Product Warranties and Other Commitments (Tables)
 3 Months Ended
Jun. 30, 2012
Product Warranties and Other Commitments [Abstract]  
Changes in the warranty liability
Changes in the warranty liability were as follows:

 
Three months ended June 30
 
 
2012
 
 
2011
 
Balance, April 1
 
$
11,385
 
 
$
14,681
 
Accruals for warranties issued in current period
 
 
1,342
 
 
 
1,549
 
(Reversals) accruals related to pre-existing warranties
 
 
(480
)
 
 
157
 
Settlements made
 
 
(1,428
)
 
 
(2,139
)
Effect of exchange rate changes
 
 
(298
)
 
 
160
 
Balance, June 30
 
$
10,521
 
 
$
14,408