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Product Warranties (Tables)
 6 Months Ended
Oct. 26, 2013
Product Warranties [Abstract]  
Reconciliation of changes in product warranty liability
A reconciliation of the changes in our product warranty liability for the three months ended October 26, 2013, and October 27, 2012, is as follows:

 
 
Second Quarter Ended
  
Six Months Ended
 
 (Unaudited, amounts in thousands)
 
10/26/13
  
10/27/12
  
10/26/13
  
10/27/12
 
Balance as of the beginning of the period
 
$
15,821
  
$
14,319
  
$
15,525
  
$
14,327
 
Accruals during the period
  
3,884
   
3,518
   
7,672
   
6,908
 
Settlements during the period
  
(3,776
)
  
(3,524
)
  
(7,268
)
  
(6,922
)
Balance as of the end of the period
 
$
15,929
  
$
14,313
  
$
15,929
  
$
14,313