Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accounts payable	$ 104,665	$ 217,578
Revenues payable	148,387	145,816
Accrued capital expenditures	27,875	61,950
Accrued interest	49,370	36,295
Accrued severance	2,682	28,803
Total accounts payable and accrued liabilities	$ 332,979	$ 490,442