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Fair Value Measurements (Tables)
9 Months Ended
Jan. 25, 2014
Fair Value Measurements [Abstract]  
Schedule of assets measured at fair value on recurring basis
The following table presents the fair value hierarchy for those assets measured at fair value on a recurring basis at January 25, 2014, and April 27, 2013:

As of January 25, 2014
 
 
 
Fair Value Measurements
 
(Unaudited, amounts in thousands)
 
Level 1(a)
  
Level 2(a)
  
Level 3
 
Assets
 
  
  
 
Available-for-sale securities
 
$
1,225
  
$
51,154
  
$
 
Trading securities
  
   
1,604
   
 
Total
 
$
1,225
  
$
52,758
  
$
 
 
(a)There were no transfers between Level 1 and Level 2 during fiscal 2014.

As of April 27, 2013
 
 
 
Fair Value Measurements
 
(Unaudited, amounts in thousands)
 
Level 1(b)
  
Level 2(b)
  
Level 3
 
Assets
 
  
  
 
Available-for-sale securities
 
$
1,217
  
$
38,747
  
$
 
Trading securities
  
   
1,126
   
 
Total
 
$
1,217
  
$
39,873
  
$
 
 
(b)There were no transfers between Level 1 and Level 2 during fiscal 2013.