Asset Acquisitions (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($) a	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)
Asset Acquisitions [Line Items]
Payments to acquire oil and gas property and equipment		$ (319)	$ 24,615
Other Martin County Acquisition 2018 [Member]
Asset Acquisitions [Line Items]
Net acres acquired | a	720
Payments to acquire oil and gas property and equipment	$ 24,600