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Operating Leases - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Lessee, Lease, Description [Line Items]        
Weighted average remaining lease term 4 years 1 month 6 days 4 years 1 month 6 days 4 years 1 month 6 days 4 years 1 month 6 days
Weighted average discount rate (as a percent) 6.40% 7.20% 6.40% 7.20%
Foreign currency transaction gain, before tax   $ 0.4    
Foreign currency transaction loss, before tax $ (0.5)   $ (0.4) $ (3.5)
Minimum        
Lessee, Lease, Description [Line Items]        
General term of leased facilities 3 years   3 years  
Leased facilities renewal term 3 years   3 years  
Maximum        
Lessee, Lease, Description [Line Items]        
General term of leased facilities 5 years   5 years  
Leased facilities renewal term 5 years   5 years