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Leases, Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Lease Cost [Abstract]    
Operating lease cost $ 10,392 $ 9,041
Variable lease cost 709 152
Short-term lease cost 3,053 8,277
Sublease income (274) (244)
Total lease cost $ 13,880 $ 17,226