XML 74 R59.htm IDEA: XBRL DOCUMENT v3.20.4
Retirement Plan - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Retirement Benefits [Abstract]      
Defined contribution plan, maximum employee contribution percentage 60.00%    
Defined contribution plan, employer contribution amount $ 6.7 $ 4.9 $ 1.8