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Leases Additional Lease Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Lessee, Lease, Description [Line Items]      
Lease cost recognized $ 33,524    
Rent expense   $ 35,900 $ 33,600
Maximum      
Lessee, Lease, Description [Line Items]      
Lease term 10 years    
Minimum      
Lessee, Lease, Description [Line Items]      
Lease term 1 year