Supplemental Disclosures (Details 1) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Condensed Cash Flow Statements, Captions [Line Items]
Cash paid for interest expense, net of amounts capitalized	$ 38,387	$ 37,632
Increase in liabilities for oil and natural gas properties capital expenditures	4,469	13,536
Increase in liabilities for midstream properties capital expenditures	9,203	5,854
Stock-based compensation expense recognized as liability	1,188	1,010
Transfer of inventory (to) from oil and natural gas properties	(335)	370
Mineral Properties
Condensed Cash Flow Statements, Captions [Line Items]
Increase (decrease) in asset retirement obligations	1,393	321
Midstream Properties
Condensed Cash Flow Statements, Captions [Line Items]
Increase (decrease) in asset retirement obligations	$ 26	$ 283