Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Oil and natural gas revenues	$ 38,008	$ 17,447	$ 103,250	$ 52,009
Realized gain on derivatives	3,371	1,435	11,147	4,237
Unrealized (loss) gain on derivatives	(12,993)	2,870	(1,149)	1,534
Total revenues	28,386	21,752	113,248	57,780
Expenses
Production taxes and marketing	2,822	1,848	7,605	4,801
Lease operating	6,491	2,065	17,511	5,639
Depletion, depreciation and amortization	21,680	7,288	52,799	22,578
Accretion of asset retirement obligations	59	61	170	158
Full-cost ceiling impairment	3,596		36,801	35,673
General and administrative	3,439	4,207	11,321	9,919
Total expenses	38,087	15,469	126,207	78,768
Operating (loss) income	(9,701)	6,283	(12,959)	(20,988)
Other income (expense)
Net loss on asset sales and inventory impairment			(60)
Interest expense	(144)	(171)	(453)	(461)
Interest and other income	55	82	157	248
Total other expense	(89)	(89)	(356)	(213)
(Loss) income before income taxes	(9,790)	6,194	(13,315)	(21,201)
Income tax provision (benefit)
Current	188		188	(46)
Deferred	(781)		(1,430)	(6,906)
Total income tax benefit	(593)		1,242	(6,952)
Net (loss) income	$ (9,197)	$ 6,194	$ (12,073)	$ (14,249)
Basic
Basic	55,271	42,751	53,519	42,702
Diluted
Diluted	55,271	42,879	53,519	42,702
Class A
Basic
Basic	$ (0.17)	$ 0.14	$ (0.23)	$ (0.34)
Diluted
Diluted	$ (0.17)	$ 0.14	$ (0.23)	$ (0.34)
Basic
Basic	55,271	41,720	53,379	41,671
Diluted
Diluted	55,271	41,848	53,379	41,671
Class B
Basic
Basic		$ 0.21	$ (0.03)	$ (0.14)
Diluted
Diluted		$ 0.21	$ (0.03)	$ (0.14)
Basic
Basic		1,031	140	1,031
Diluted
Diluted		1,031	140	1,031