LT Debt (Details 5) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Apr. 26, 2013
Apr. 27, 2012
Interest Free Note Payable [Abstract]    
Interest Free Note Payable $ 1,000  
Interest Free Note Payable Term P10Y  
Interest Free Note Payable Discounted 816  
Long-Term Debt [Line Items]    
Principal Amount 97,145 135,716
Make Whole Amount $ 6,150  
Required Notice 30  
Maximum [Member]
   
Long-Term Debt [Line Items]    
Required Notice 60  
Series D due July 2016 [Member]
   
Long-Term Debt [Line Items]    
Maturity Date Jul. 28, 2016  
Series A due July 2014 [Member]
   
Long-Term Debt [Line Items]    
Maturity Date Jul. 28, 2014