CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues
Gain (Loss) on Disposition of Property Plant Equipment	$ 5	$ (177)	$ (36)
Total revenues	471,216	440,832	160,054
Operating expenses
Lease operating	43,088	35,879	21,784
Cost of Goods and Services Sold	23,197	18,626	10,734
Production and ad valorem taxes	28,057	23,547	8,814
General and administrative	25,484	26,064	18,201
Depreciation, depletion and amortization	174,569	127,961	48,649
Total operating expenses	294,395	232,077	108,182
Operating income	176,821	208,755	51,872
Other income (expense)
Interest expense, net of amounts capitalized	(35,811)	(26,462)	(6,392)
Derivatives	(68,131)	37,427	(17,819)
Other, net	(153)	2,266	58
Reorganization items, net	0	3,322	0
Income before income taxes	72,726	225,308	27,719
Income tax (expense) benefit	(2,137)	(523)	4,943
Net income	$ 70,589	$ 224,785	$ 32,662
Net income per share:
Basic (in dollars per share)	$ 4.67	$ 14.93	$ 2.18
Diluted (in dollars per share)	$ 4.67	$ 14.70	$ 2.17
Weighted average shares outstanding – basic	15,110	15,059	14,996
Weighted average shares outstanding – diluted	15,126	15,292	15,063
Oil and Gas, Exploration and Production [Member]
Revenues
Revenue from contract with customer	$ 434,713	$ 402,485	$ 140,886
Oil and Condensate [Member]
Revenues
Revenue from contract with customer	16,589	21,073	10,066
Natural Gas, Production [Member]
Revenues
Revenue from contract with customer	17,733	15,972	8,517
Product and Service, Other [Member]
Revenues
Revenue from contract with customer	$ 2,176	$ 1,479	$ 621