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Lease Commitments - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Termination option 1 year    
Short-term lease obligation $ 5.3 $ 5.2  
Reduction in ROU assets due to cancellation 0.6 0.6  
Reduction in lease liability due to cancellation $ 0.3 $ 0.3  
Operating leases expense     $ 4.0
Other Accrued Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherAccruedLiabilitiesCurrent us-gaap:OtherAccruedLiabilitiesCurrent  
Minimum      
Lessee, Lease, Description [Line Items]      
Remaining lease term 1 year    
Extension option 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Remaining lease term 10 years    
Extension option 5 years