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Lessee Leases - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]      
Operating lease cost $ 14.6    
Rent expense prior to the adoption of the new lease standard   $ 12.7 $ 11.5
Minimum      
Lessee, Lease, Description [Line Items]      
Term of operating leases 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Term of operating leases 12 years