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Leases - Components of 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]        
Straight line operating lease costs $ 1,457 $ 995 $ 4,078 $ 2,684
Finance lease costs        
Straight line finance lease costs 88   205  
Interest on finance lease liability 27   83  
Variable lease costs 1,111 257 2,831 558
Total lease cost $ 2,683 $ 1,252 $ 7,197 $ 3,242