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Leases - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Cash Flow, Operating Activities, Lessee [Abstract]        
Cash flow for operating activities $ (12,733) $ (13,967) $ (26,781) $ (27,931)
Right of use assets obtained in exchange for new operating lease liabilities $ 0 $ 594 $ 0 $ 11,520