CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (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
Crude oil	$ 86,867	$ 58,382	$ 149,925	$ 117,105
Natural gas liquids (NGLs)	7,313	7,556	14,440	16,627
Natural gas	15,554	10,303	27,593	25,189
(Loss) gain on sales of property and equipment, net	256	78	(293)	834
Other	(335)	526	1,188	1,501
Total revenues	109,655	76,845	192,853	161,256
Operating expenses
Lease operating	8,629	9,264	16,434	18,407
Gathering, processing and transportation	2,980	4,391	6,559	8,545
Production and ad valorem taxes	6,976	(254)	12,935	3,326
General and administrative	15,656	11,747	26,599	23,888
Exploration	7,845	9,384	14,140	17,382
Depreciation, depletion and amortization	64,329	51,740	115,905	102,557
Impairments	0	28,616	0	28,616
Total operating expenses	106,415	114,888	192,572	202,721
Operating income (loss)	3,240	(38,043)	281	(41,465)
Other income (expense)
Interest expense	(21,808)	(15,084)	(36,287)	(29,858)
Gains (Losses) on Extinguishment of Debt	(29,157)	0	(29,157)	0
Derivatives	8,588	43,826	827	43,521
Other	17	28	44	29
Loss from operations before income taxes	(39,120)	(9,273)	(64,292)	(27,773)
Income tax benefit	13,682	3,635	22,471	10,236
Net loss	(25,438)	(5,638)	(41,821)	(17,537)
Preferred stock dividends	(1,725)	0	(3,450)	0
Loss attributable to common shareholders - Basic and Diluted	$ (27,163)	$ (5,638)	$ (45,271)	$ (17,537)
Loss per share:
Basic (in dollars per share)	$ (0.43)	$ (0.12)	$ (0.77)	$ (0.38)
Diluted (in dollars per share)	$ (0.43)	$ (0.12)	$ (0.77)	$ (0.38)
Weighted average shares outstanding - basic	62,899	46,030	59,141	45,988
Weighted average shares outstanding - diluted	62,899	46,030	59,141	45,988