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Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 9,626 $ 28,045
Accrued compensation 21,628 30,822
Accrued property and other taxes 15,720 16,301
Accrued severance and other charges 786 2,328
Income taxes 15,193 12,075
Affiliated 873 3,915
Accrued purchase orders and other 44,588 30,495
Total accounts payable and accrued liabilities $ 108,414 $ 123,981