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Stock-Based Compensation - Summary of the Activity For Non-Employee Directors Stock Unit Awards (Details) (Non-employee director stock unit awards [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Apr. 27, 2014
Jan. 26, 2014
Non-employee director stock unit awards [Member]
   
Number of Units    
Beginning balance (in shares) 18  
Stock units granted (in shares) 0  
Stock units vested (in shares) 0  
Stock units forfeited (in shares) 0  
Ending balance (in shares) 18 18
Recorded Liability    
Beginning balance $ 3,981  
Change in liability 285  
Ending balance 4,266 3,981
Weighted Averaged Grant Date Fair Value (per unit)    
Beginning balance (in dollars per share) $ 35.17  
Stock units granted (in dollars per share) $ 0.00  
Stock units vested (in dollars per share) $ 0.00  
Stock units forfeited (in dollars per share) $ 0.00  
Ending balance (in dollars per share) $ 35.17 $ 35.17
Aggregate Unrecognized Compensation    
Beginning balance 177  
Ending balance $ 77  
Period Over Which Expected to be Recognized (in years)    
Weighted average period over which expected to be recognized 2 months 5 months