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Commitments and Contingencies - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Leases, Other Information    
Financing cash flows from finance leases $ 991 $ 0
Right-of-use assets obtained in exchange for new finance lease liabilities 15,064  
Right-of-use assets obtained in exchange for new operating lease liabilities 3,681  
Opening adjustment to right-of-use operating asset upon lease commencement $ 2,850