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Stock Based Compensation (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Apr. 28, 2013
Apr. 29, 2012
Apr. 24, 2011
Weighted Average Grant-Date Fair Value      
Outstanding at the beginning of the period (in dollars per share) $ 8.99    
Granted (in dollars per share) $ 6.18    
Vested (in dollars per share) $ 8.79    
Forfeited and expired (in dollars per share) $ 6.83    
Outstanding at the end of the period (in dollars per share) $ 7.32    
Weighted Average Exercise Price      
Outstanding at the beginning of the period (in dollars per share) $ 11.33    
Exercised (in dollars per share) $ 6.69    
Forfeited and expired (in dollars per share) $ 18.30    
Outstanding at the end of the period (in dollars per share) $ 10.71    
As of the end of the period      
Outstanding exercisable options, Weighted Average Exercise Price (in dollars per share) $ 10.83    
Restricted Stock
     
Restricted Stock      
Outstanding at the beginning of the period (in shares) 890,525    
Granted (in shares) 541,712    
Vested (in shares) (599,566)    
Forfeited and expired (in shares) (27,973)    
Outstanding at the end of the period (in shares) 804,698    
As of the end of the period      
Weighted average remaining contractual term, Restricted Stock 10 months 24 days    
Aggregate intrinsic value:      
Outstanding, Restricted Stock $ 5,669    
Nonvested:      
Unrecognized compensation cost 1,934    
Weighted average remaining vesting period 10 months 24 days    
Stock Options
     
Options      
Outstanding at the beginning of the period (in shares) 1,271,710    
Granted (in shares) 0 0 0
Exercised (in shares) (100,000)    
Forfeited and expired (in shares) (157,050)    
Outstanding at the end of the period (in shares) 1,014,660 1,271,710  
As of the end of the period      
Outstanding exercisable options 952,660    
Weighted average remaining contractual term, Options 4 years 6 months    
Aggregate intrinsic value:      
Outstanding exercisable 213    
Outstanding, Options 267    
Nonvested:      
Unrecognized compensation cost $ 59    
Weighted average remaining vesting period 1 year