Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 257,286	$ 195,910
Costs and Expenses:
General and administrative, net	22,570	30,000
Depreciation, depletion, and amortization	68,035	46,933
Accretion of asset retirement obligation	419	2,322
Lease operating cost	17,643	21,908
Results of Operations, Transportation Costs	23,848	19,360
Severance and other taxes	11,394	8,205
Total Operating Expenses	143,909	128,728
Operating Income (Loss)	113,377	67,182
Net gain (loss) on commodity derivatives	(9,777)	17,913
Interest expense, net	(27,666)	(15,070)
Other income (expense), net	(391)	(8)
Income (Loss) Before Income Taxes	75,543	70,017
Provision (Benefit) for Income Taxes	928	(1,954)
Net Income (Loss)	$ 74,615	$ 71,971
Per Share Amounts-
Earnings (Loss) Per Share, Basic	$ 6.40	$ 6.28
Earnings (Loss) Per Share, Diluted	$ 6.34	$ 6.25
Weighted Average Shares Outstanding - Basic	11,655	11,453
Weighted Average Shares Outstanding - Diluted	11,764	11,514