Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Oil and gas sales	$ 38,076	$ 33,376	$ 74,052	$ 69,373
Gas gathering revenue	26	37	59	81
Total revenues	38,102	33,413	74,111	69,454
Expenses:
Lease operating expenses	8,837	9,085	18,556	18,750
Production taxes	1,481	(1,917)	2,509	(768)
Depreciation, depletion and amortization	14,536	15,762	27,407	30,992
Ceiling test writedown	0	53,485	0	73,596
General and administrative	6,351	5,999	11,067	11,578
Accretion of asset retirement obligation	328	517	660	1,017
Interest expense	3,116	2,413	5,980	4,683
Total expenses	34,649	85,344	66,179	139,848
Other income (expense):
Other income	62	123	256	272
Derivative income (expense)	594	(375)	157	(375)
Other operating income (expense), net	656	(252)	413	(103)
Income (loss) from operations	4,109	(52,183)	8,345	(70,497)
Income tax expense (benefit)	(840)	1,049	(491)	61
Net income (loss)	4,949	(53,232)	8,836	(70,558)
Preferred stock dividend	1,287	1,288	2,567	2,570
Net income (loss) available to common stockholders	$ 3,662	$ (54,520)	$ 6,269	$ (73,128)
Basic
Net income (loss) per share (in usd per share)	$ 0.06	$ (0.87)	$ 0.10	$ (1.17)
Diluted
Net income (loss) per share (in usd per share)	$ 0.06	$ (0.87)	$ 0.10	$ (1.17)
Weighted average number of common shares:
Basic (shares)	62,963	62,363	62,899	62,289
Diluted (shares)	63,130	62,363	63,084	62,289