XML 63 R53.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Equity and Stock-Based Compensation - Textual (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Sep. 28, 2018
Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options granted     0 0    
Closing stock price         $ 37.52 $ 24.92
Intrinsic value of options exercised $ 1.4 $ 1.0 $ 2.5 $ 2.4    
Performance-Based Restricted Stock Units (PSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of granted shares that will vest if target stock price performance is achieved     66.70%      
Maximum percent of granted shares that will vest if maximum stock price performance is achieved     100.00%      
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Period of vesting     1 year      
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche Two [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Period of vesting     2 years      
Performance-Based Restricted Stock Units (PSUs) [Member] | Tranche Three [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Period of vesting     3 years