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Leases - Balance sheet (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease ROU asset $ 29,475 $ 13,693
Operating lease liabilities- current 4,868 5,153
Operating lease liabilities- noncurrent 25,510 9,018
Total operating lease liability $ 30,378 $ 14,171