XML 89 R71.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Additional Information (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]    
Weighted average remaining lease terms (in years) - operating leases 7 years 10 months 24 days 8 years 8 months 12 days
Renewal term 5 years  
Termination period 6 years 8 months 12 days  
Office Building    
Lessee, Lease, Description [Line Items]    
Weighted average remaining lease terms (in years) - operating leases 9 years 10 months 24 days