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Share-based Compensation - RSUs / PSUs Outstanding (Details) - RSUs/PSUs - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Jan. 01, 2016
Dec. 26, 2014
Dec. 27, 2013
Dec. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding (shares) 988,542 675,932 325,000 150,000
Outstanding Intrinsic Value $ 8.0      
Vested (shares) 249,797 131,667 100,000  
Vested Intrinsic Value $ 9.8      
$40.03        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 40.03      
Outstanding (shares) 190,748      
Outstanding Intrinsic Value $ 0.0      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$33.44        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 33.44      
Outstanding (shares) 177,213      
Outstanding Intrinsic Value $ 1.0      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$33.44        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 33.44      
Outstanding (shares) 40,506      
Outstanding Intrinsic Value $ 0.2      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$25.52        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 25.52      
Outstanding (shares) 152,692      
Outstanding Intrinsic Value $ 2.0      
Vested (shares) 50,864      
Vested Intrinsic Value $ 2.0      
$29.99        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 29.99      
Outstanding (shares) 182,420      
Outstanding Intrinsic Value $ 1.6      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$26.52        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 26.52      
Outstanding (shares) 137,987      
Outstanding Intrinsic Value $ 1.7      
Vested (shares) 91,958      
Vested Intrinsic Value $ 3.6      
$24.68        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 24.68      
Outstanding (shares) 106,976      
Outstanding Intrinsic Value $ 1.5      
Vested (shares) 106,975      
Vested Intrinsic Value $ 4.2