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:
Oil sales	$ 77,636	$ 48,056	$ 149,854	$ 93,138
Natural gas liquid sales	10,998	3,901	20,717	10,173
Natural gas sales	14,464	2,379	23,259	5,829
Gains on commodity derivative contracts - net	22,421	48,143	2,297	23,478
Other	489	103	903	207
Total revenues	126,008	102,582	197,030	132,825
EXPENSES:
Lease operating and workover	17,575	5,921	31,446	12,388
Severance and other taxes	6,579	6,272	12,534	11,648
Asset retirement accretion	313	164	567	298
Depreciation, depletion, and amortization	52,830	27,882	94,806	55,909
General and administrative	15,272	4,956	26,298	11,019
Acquisition and transaction costs	11,492		11,492
Total expenses	104,061	45,195	177,143	91,262
OPERATING INCOME	21,947	57,387	19,887	41,563
OTHER INCOME (EXPENSE)
Interest income	5	143	10	150
Interest expense - net of amounts capitalized	(16,621)	(990)	(27,488)	(2,680)
Total other income (expense)	(16,616)	(847)	(27,478)	(2,530)
INCOME (LOSS) BEFORE TAXES	5,331	56,540	(7,591)	39,033
Income tax benefit (expense)	(1,993)	(168,917)	2,980	(168,917)
NET INCOME (LOSS)	3,338	(112,377)	(4,611)	(129,884)
Preferred stock dividend (see Note 8)	(2,709)		(6,826)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 629	$ (112,377)	$ (11,437)	$ (129,884)
Basic and diluted net income (loss) per share attributable to common shareholders (in dollars per share)	$ 0.01	$ (1.85)	$ (0.17)	$ (2.39)
Weighted average number of common shares outstanding (in shares)	68,441	60,887	65,699	54,261