XML 69 R53.htm IDEA: XBRL DOCUMENT v3.20.4
Related Party Transactions - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Related Party Lease Agreements    
Related Party Transaction [Line Items]    
Operating lease, Rent expense $ 4.8 $ 4.6