v3.8.0.1
Stockholders’ Equity - Share Based Compensation Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Mar. 26, 2016
Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share price (usd per share) $ 16.27      
Time-Based Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted (shares) 400,000      
Performance-Based Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted (shares) 300,000      
Award vesting period 2 years 3 years 4 years  
Market-Based Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted (shares) 500,000      
Award vesting period 5 years      
Weighted average share price targets period 120 days      
Restricted stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted (shares) 1,217,000      
Weighted average grant date fair value (in dollars per share) $ 13.77     $ 10.58
Unrecognized compensation cost, period for recognition 3 years 1 month      
Purchase price for vested RSUs (usd per share) $ 0.001      
Settled (RSUs) (usd per share) $ 9.51      
Unrecognized compensation cost $ 29.1      
Restricted Stock Units and Performance-Based Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Settled (RSUs) (usd per share) $ 9.51 $ 7.07    
Total fair value of vested RSUs $ 2.0 $ 1.1    
Intrinsic value of options exercised and RSUs vested $ 6.8 $ 2.9    
Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost, period for recognition 2 years 9 months      
Stock options granted (shares) 107,000 700,000    
Weighted average exercise price (usd per share) $ 17.45 $ 11.99    
The aggregate fair value of the options vested $ 0.7 $ 1.5    
Unrecognized compensation cost $ 6.7      
Total shares of common stock reserved for future issuance 14,308,000      
2014 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total shares of common stock reserved for future issuance 2,576,000      
Maximum | Market-Based Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average grant date fair value (in dollars per share) $ 16.34      
Unrecognized compensation cost, period for recognition 1 year 7 months 6 days      
Minimum | Market-Based Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average grant date fair value (in dollars per share) $ 13.99      
Unrecognized compensation cost, period for recognition 10 months 17 days