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Share-Based Compensation - Summary of the Activity for Performance-Based Restricted Stock Units (Details) - $ / shares
12 Months Ended
Jan. 26, 2020
Jan. 27, 2019
Jan. 28, 2018
Market Performance Restricted Stock Units      
Units      
Beginning balance (in shares) 203,000    
Performance units granted (in shares) 266,000 200,442 215,857
Performance units vested (in shares) (79,245)    
Performance units forfeited (in shares) (133,000)    
Ending balance (in shares) 257,000 203,000  
Weighted Average Grant Date Fair Value (per share)      
Beginning balance (in dollars per share) $ 37.51    
Weighted average fair value units granted (in dollars per share) 59.49    
Performance units vested (in dollars per share) 36.30    
Performance units forfeited (in dollars per share) 48.94    
Ending balance (in dollars per share) $ 54.61 $ 37.51  
Non-employee director stock unit awards | Restricted Stock Units (RSUs)      
Units      
Beginning balance (in shares) 26,000    
Performance units granted (in shares) 26,000    
Performance units vested (in shares) (26,000)    
Performance units forfeited (in shares) 0    
Ending balance (in shares) 26,000 26,000  
Weighted Average Grant Date Fair Value (per share)      
Beginning balance (in dollars per share) $ 48.84    
Weighted average fair value units granted (in dollars per share) 50.55    
Performance units vested (in dollars per share) 48.84    
Performance units forfeited (in dollars per share) 0    
Ending balance (in dollars per share) $ 50.55 $ 48.84  
Non-employee director stock unit awards | Restricted Stock Units (RSUs) | Subject to share settlement      
Units      
Beginning balance (in shares) 12,000    
Performance units granted (in shares) 12,000    
Performance units vested (in shares) (12,000)    
Performance units forfeited (in shares) 0    
Ending balance (in shares) 12,000 12,000  
Non-employee director stock unit awards | Restricted Stock Units (RSUs) | Subject to cash settlement      
Units      
Beginning balance (in shares) 14,000    
Performance units granted (in shares) 14,000    
Performance units vested (in shares) (14,000)    
Performance units forfeited (in shares) 0    
Ending balance (in shares) 14,000 14,000