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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 $ 2,437 $ 3,586 $ 7,255 $ 6,642
Amortization of right-of-use assets 0 150 0 299
Interest expense 0 1 0 3
Variable lease cost 1,192 1,465 2,513 2,517
Total lease cost $ 3,629 $ 5,202 $ 9,768 $ 9,461