CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Natural gas sales	$ 40,940	$ 25,147
Oil sales	12,861	11,016
Total oil and gas sales	53,801	36,163
Gain on sale of oil and gas properties		740
Total revenue	53,801	36,903
Operating expenses:
Production taxes	1,097	1,186
Gathering and transportation	4,128	4,365
Lease operating	9,889	12,960
Exploration		7,753
Depreciation, depletion and amortization	29,905	38,836
General and administrative	6,401	5,575
Impairment of oil and gas properties		22,718
Total operating expenses	51,420	93,393
Operating income (loss)	2,381	(56,490)
Other income (expenses):
Gain on extinguishment of debt		33,380
Gain from derivative financial instruments	7,860	656
Other income	163	281
Interest expense	(32,900)	(29,944)
Total other income (expenses)	(24,877)	4,373
Loss before income taxes	(22,496)	(52,117)
Provision for income taxes	(435)	(4,460)
Net loss	$ (22,931)	$ (56,577)
Net loss per share – basic and diluted	$ (1.61)	$ (5.71)
Weighted average shares outstanding – basic and diluted	14,225	9,902