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Leases - Components of Lease Costs (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease cost $ 4,508 $ 3,966
Short-term lease cost 52 348
Variable lease cost 1,652 1,607
Total lease cost $ 6,212 $ 5,921