Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Oil and gas sales	$ 17,320	$ 33,451
Expenses:
Lease operating expenses	8,177	10,902
Production taxes	338	956
Depreciation, depletion and amortization	10,138	20,654
Ceiling test write-down	18,857	108,911
General and administrative	8,599	5,339
Accretion of asset retirement obligation	608	859
Interest expense	8,257	7,874
Expenses	54,974	155,495
Other income:
Other income	97	157
Loss from operations	(37,557)	(121,887)
Income tax expense (benefit)	86	(927)
Net loss	(37,643)	(120,960)
Preferred stock dividend	1,494	1,280
Loss available to common stockholders	$ (39,137)	$ (122,240)
Basic
Net income (loss) per share (in usd per share)	$ (0.58)	$ (1.89)
Diluted
Net income (loss) per share (in usd per share)	$ (0.58)	$ (1.89)
Weighted average number of common shares:
Basic (shares)	67,824	64,774
Diluted (shares)	67,824	64,774