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Leases - Schedule of Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Leases [Abstract]    
Operating lease cost $ 1,210 $ 3,325
Short-term lease cost 211 731
Variable lease cost $ 362 $ 1,054