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Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Operating lease cost $ 7,018 $ 5,578 $ 19,741 $ 15,670
Variable lease cost 1,806 1,234 4,624 2,590
Total operating lease costs 8,824 6,812 24,365 18,260
Amortization of assets under finance lease 4,124 419 6,608 1,827
Interest 524 186 1,259 454
Total finance lease costs $ 4,648 $ 605 $ 7,867 $ 2,281