Supplemental Disclosures (Details 1) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Cash paid for interest expense, net of amounts capitalized	$ 35,326	$ 0
Increase in liabilities for oil and natural gas properties capital expenditures	16,184	5,863
(Decrease) increase in liabilities for midstream properties capital expenditures	(3,908)	8,090
Stock-based compensation expense (benefit) recognized as liability	605	(102)
Transfer of inventory from (to) oil and natural gas properties	250	(176)
Transfer of inventory to midstream properties	0	(820)
Mineral Properties
Condensed Cash Flow Statements, Captions [Line Items]
Increase (decrease) in asset retirement obligations	$ 445	$ 337