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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Accrued compensation and benefits $ 44,232 $ 30,462
Miscellaneous accrued liabilities 13,285 7,560
Total accrued liabilities $ 57,517 $ 38,022