Concentration of Risk Accounts Receivable, Net of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Midstream Assets Deferred Payments	$ 81,702	$ 0
Accounts Receivable, Allowance for Credit Loss, Current	(7,476)	(4,381)
Accounts Receivable, after Allowance for Credit Loss, Current	266,354	181,434
Natural gas, NGLs and crude oil sales
Concentration Risk [Line Items]
Accounts Receivable, before Allowance for Credit Loss	149,758	155,756
Joint interest billing
Concentration Risk [Line Items]
Accounts Receivable, before Allowance for Credit Loss	29,510	19,580
Derivative Counterparties
Concentration Risk [Line Items]
Accounts Receivable, before Allowance for Credit Loss	0	3,937
Other Accounts Receivable
Concentration Risk [Line Items]
Accounts Receivable, before Allowance for Credit Loss	$ 12,860	$ 6,542