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Leases - Components of Lease Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Leases [Abstract]        
Operating lease cost $ 1,600 $ 501 $ 2,790 $ 793
Finance lease cost:        
Amortization of leased assets 2,708 2,918 6,833 5,916
Interest on lease liabilities 1,122 542 1,916 1,088
Net lease cost $ 5,430 $ 3,961 $ 11,539 $ 7,797