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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]      
Operating lease cost $ 39,506    
Amortization of right-of-use assets 1,225 $ 1,000 $ 1,000
Interest on lease liabilities 352    
Total finance lease cost 1,577    
Short-term lease cost 3,293    
Total lease cost 44,376    
Operating cash flows for operating leases 38,847    
Operating cash flows for finance leases 276    
Financing activities for finance leases 1,918    
Right-of-use assets obtained in exchange for new operating lease liabilities 23,940 $ 12,223  
Right-of-use assets obtained in exchange for new finance lease liabilities $ 2,260    
Operating leases 6 years 9 months 18 days    
Finance leases 2 years 10 months 24 days    
Operating leases 4.65%    
Finance leases 6.47%