Supplemental Oil and Natural Gas Disclosures - Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
Standardized measure, beginning of year	$ 1,087,616	$ 862,649	$ 603,015
Sales, net of production costs	(384,745)	(475,742)	(295,941)
Net changes in prices and production costs related to future production	(229,651)	275,091	161,221
Extensions, discoveries and improved recovery, net of future production and development costs	186,424	370,695	166,616
Previously estimated development costs incurred during the period	0	14,509	11,118
Revisions of estimated future development costs	1,198	(558)	2,653
Revisions of previous quantity estimates, net of related costs	51,405	(5,401)	60,476
Accretion of discount	109,158	86,441	60,512
Purchases of reserves in place, less related costs	1,730	8,975	113,342
Other	24,759	(49,043)	(20,363)
Net increase (decrease) in standardized measures	(239,722)	224,967	259,634
Standardized measure, end of year	$ 847,894	$ 1,087,616	$ 862,649