XML 60 R50.htm IDEA: XBRL DOCUMENT v3.7.0.1
Share-Based Compensation (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 03, 2016
shares
Jul. 02, 2017
USD ($)
$ / shares
shares
Jul. 03, 2016
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSU outstanding | shares   229,467    
Shares available for grant | shares   767,385    
Compensation expense (benefit)   $ 1.4 $ 2.9  
Unrecognized compensation costs   $ 9.1    
Weighted average period of recognition of compensation expense (in years)   2 years 1 month 24 days    
Weighted average contractual term for stock options outstanding, years   5 years 9 months 20 days    
Weighted average contractual term for stock options exercisable, years   5 years 1 month 14 days    
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Grant Date Fair Value | $ / shares   $ 19.36 $ 11.91  
Stock options outstanding | shares   852,441    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value   $ 0.4    
Aggregate intrinsic value of stock options outstanding   8.3    
Aggregate intrinsic value of stock options exercisable   $ 4.7    
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted | shares   55,445 85,901  
Granted RSU awards fair value | $ / shares   $ 61.05 $ 39.23  
Aggregate intrinsic value of RSU Awards / RSU MSPs   $ 1.6    
Aggregate intrinsic value of RSU Awards outstanding   9.3    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   $ 0.2    
Restricted Stock Units (RSUs) [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance target threshold (as a percent)   0.00%    
Restricted Stock Units (RSUs) [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance target threshold (as a percent)   200.00%    
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted | shares 43,016 31,369    
Restricted Stock Units Management Stock Purchase Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted | shares   26,726 20,130  
Restricted stock units discount amount | $ / shares   20.13 12.83  
Aggregate intrinsic value of RSU Awards / RSU MSPs   $ 0.3    
Aggregate intrinsic value of RSU Awards outstanding   1.8    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested And Deferred Aggregate Intrinsic Value   $ 0.0    
Cash Settled Stock Unit Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSU outstanding | shares   29,848   33,320
Cash used to settle awards   $ 0.3    
Accrued expenses and current liabilities for Cash Settled Stock Unit Awards   0.9   $ 1.0
Cash Settled Stock Unit Awards [Member] | Selling, General and Administrative Expenses [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense (benefit)   0.1 $ 0.5  
February 2015 [Member] | Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense (benefit)   $ (1.1)