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Stock-Based Compensation - Summary of the Activity for Non-Employee Directors Stock Unit Awards (Details) - Subject to Cash Settlement - Non-employee director stock unit awards - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Jan. 31, 2016
Jan. 25, 2015
Jan. 26, 2014
Jan. 27, 2013
Number of Units        
Beginning balance (in shares) 24 18 20  
Stock units granted (in shares) 28 24 18  
Stock units vested (in shares) (24) (18) (20)  
Stock units forfeited (in shares) 0 0 0  
Ending balance (in shares) 28 24 18 20
Recorded Liability        
Beginning balance $ 5,214 $ 3,981 $ 4,557  
Change in liability (1,344) 1,233 (576)  
Ending balance $ 3,870 $ 5,214 $ 3,981 $ 4,557
Weighted Averaged Grant Date Fair Value (per unit)        
Beginning balance (in dollars per share) $ 26.59 $ 35.17 $ 24.46  
Weighted average fair value units granted (in dollars per share) 19.70 26.59 35.17  
Stock units vested (in dollars per share) 26.59 35.17 24.46  
Ending balance (in dollars per share) $ 19.70 $ 26.59 $ 35.17 $ 24.46
Aggregate Unrecognized Compensation        
Beginning balance $ 275 $ 177 $ 253  
Ending balance $ 221 $ 275 $ 177 $ 253
Period Over Which Expected to be Recognized (in years)        
Ending Balance 4 months 24 days 4 months 24 days 4 months 24 days 4 months 24 days