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Leases - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Operating leases, rent expense before Topic 842 adoption   $ 17,036 $ 16,726
Operating lease payments, leases not yet commenced $ 1,368    
Total financing lease liabilities $ 296    
Minimum      
Lessee, Lease, Description [Line Items]      
Remaining lease term (less than) (in years) 1 year    
Renewal term (up to) (in years) 1 year    
Termination period (in years) 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Remaining lease term (less than) (in years) 9 years    
Renewal term (up to) (in years) 10 years    
Termination period (in years) 10 years