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Operating Leases - Supplemental Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Operating Leases [Abstract]    
Operating lease right of use asset $ 298,957 $ 304,549
Operating Lease, Liability, Current (88,622) (86,466)
Operating Lease, Liability, Noncurrent (194,887) $ (193,504)
Operating Lease, Liability $ (283,509)