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Share-Based Compensation - RSUs / PSUs Outstanding (Details) - RSUs/PSUs - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 29, 2017
Dec. 30, 2016
Jan. 01, 2016
Dec. 26, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding (shares) 761,152 932,036 988,542 675,932
Outstanding Intrinsic Value $ 7.5      
Vested (shares) 235,332 304,940 249,797  
Vested Intrinsic Value $ 11.2      
$40.03        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 40.03      
Outstanding (shares) 60,483      
Outstanding Intrinsic Value $ 0.5      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$56.52        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 56.52      
Outstanding (shares) 97,149      
Outstanding Intrinsic Value $ 0.0      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$56.52        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 56.52      
Outstanding (shares) 40,479      
Outstanding Intrinsic Value $ 0.0      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$59.83        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 59.83      
Outstanding (shares) 96,116      
Outstanding Intrinsic Value $ 0.0      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$49.75        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 49.75      
Outstanding (shares) 39,210      
Outstanding Intrinsic Value $ 0.0      
Vested (shares) 0      
Vested Intrinsic Value $ 0.0      
$38.99        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 38.99      
Outstanding (shares) 80,433      
Outstanding Intrinsic Value $ 0.7      
Vested (shares) 17,513      
Vested Intrinsic Value $ 0.8      
$38.99        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 38.99      
Outstanding (shares) 30,674      
Outstanding Intrinsic Value $ 0.3      
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) 79,397      
Outstanding Intrinsic Value $ 1.1      
Vested (shares) 41,164      
Vested Intrinsic Value $ 2.0      
$33.44        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 33.44      
Outstanding (shares) 20,708      
Outstanding Intrinsic Value $ 0.3      
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) 63,146      
Outstanding Intrinsic Value $ 1.4      
Vested (shares) 63,147      
Vested Intrinsic Value $ 3.0      
$29.99        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 29.99      
Outstanding (shares) 39,849      
Outstanding Intrinsic Value $ 0.7      
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) 64,290      
Outstanding Intrinsic Value $ 1.4      
Vested (shares) 64,290      
Vested Intrinsic Value $ 3.1      
$24.68        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Exercise Price (usd per share) $ 24.68      
Outstanding (shares) 49,218      
Outstanding Intrinsic Value $ 1.1      
Vested (shares) 49,218      
Vested Intrinsic Value $ 2.3