XML 59 R49.htm IDEA: XBRL DOCUMENT v3.8.0.1
Share-Based Compensation (Narrative) (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Oct. 02, 2016
shares
Oct. 01, 2017
USD ($)
$ / shares
shares
Oct. 02, 2016
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
RSU outstanding | shares   228,303    
Shares available for grant | shares   769,710    
Compensation expense (benefit)   $ 2.7 $ 4.2  
Unrecognized compensation costs   $ 7.8    
Weighted average period of recognition of compensation expense (in years)   1 year 11 months 27 days    
Weighted average contractual term for stock options outstanding, years   5 years 6 months 21 days    
Weighted average contractual term for stock options exercisable, years   4 years 10 months 15 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   850,580    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value   $ 0.4    
Aggregate intrinsic value of stock options outstanding   6.0    
Aggregate intrinsic value of stock options exercisable   $ 3.3    
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted | shares   56,948 87,629  
Granted RSU awards fair value | $ / shares   $ 60.76 $ 39.61  
Aggregate intrinsic value of RSU Awards / RSU MSPs   $ 1.6    
Aggregate intrinsic value of RSU Awards outstanding   8.5    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   $ 0.1    
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   1.4    
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   31,097   33,320
Cash used to settle awards   $ 0.3    
Accrued expenses and current liabilities for Cash Settled Stock Unit Awards   1.0   $ 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)   0.2 $ 0.7  
February 2015 [Member] | Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense (benefit)   $ (1.1)