XML 65 R47.htm IDEA: XBRL DOCUMENT v3.19.3
Profit Sharing and 401(k) Plan - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 28, 2019
Sep. 29, 2018
Profit Sharing And401 K Plan [Abstract]        
Employee compensation deferral (in hundredths)     50.00%  
Employer Contributions $ 1.5 $ 1.5 $ 4.5 $ 4.2