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Stock-Based Compensation (Narratives) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 01, 2016
Jan. 02, 2015
Jan. 03, 2014
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum term of share based award 10 years    
Closing stock price $ 52.50    
Unrecognized compensation cost related to non-vested stock options $ 2,300    
Period for recognition 2 years    
Stock Options [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Restricted Stock and Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period for recognition 2 years    
Tax benefit (expense) from compensation expense $ 3,400 $ 2,300 $ (400)
Total unrecognized compensation cost 7,200    
Fair value of shares vested $ 16,100 $ 12,500 $ 4,000
Restricted Stock and Restricted Stock Units [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 4 years    
Restricted Stock Units (RSUs) [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Potential performance based restricted stock units to be issued based on shareholder return 0    
Restricted Stock Units (RSUs) [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Potential performance based restricted stock units to be issued based on shareholder return 577,825    
Restricted Stock And Unit Awards [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
2009 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized 1,350,000    
Number of shares available for grant 75,361    
2009 Plan [Member] | Restricted Stock and Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized 200,000    
Number of shares available for grant 9,728    
2011 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares authorized 1,350,000    
Number of shares available for grant 289,734