CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
REVENUES:
Oil sales	$ 387,226	$ 218,430	$ 177,464
Natural gas liquid sales	62,340	23,617	15,683
Natural gas sales	63,187	16,030	20,665
Losses on commodity derivative contracts - net	(44,284)	(11,158)	(4,844)
Other	1,037	754	465
Total revenues	469,506	247,673	209,433
EXPENSES:
Lease operating and workover	73,414	30,500	16,117
Gathering and transportation	5,455
Severance and other taxes	27,237	24,921	13,640
Asset retirement accretion	1,435	723	334
Depreciation, depletion, and amortization	250,396	125,561	91,699
Impairment in carrying value of oil and gas properties	453,310
General and administrative	53,250	30,541	68,915
Acquisition and transaction costs	11,803	14,884
Other	615
Total expenses	876,915	227,130	190,705
OPERATING INCOME (LOSS)	(407,409)	20,543	18,728
OTHER INCOME (EXPENSE)
Interest income	33	245	23
Interest expense - net of amounts capitalized	(83,138)	(12,999)	(2,094)
Total other income (expense)	(83,105)	(12,754)	(2,071)
INCOME (LOSS) BEFORE TAXES	(490,514)	7,789	16,657
Income tax benefit (expense)	146,529	(157,886)
NET INCOME (LOSS)	(343,985)	(150,097)	16,657
Preferred stock dividend	(15,589)	(6,500)
NET LOSS ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ (359,574)	$ (156,597)	$ 16,657
Basic and diluted net loss per share attributable to common shareholders (in dollars per share)	$ (5.47)	$ (2.61)
Basic and diluted weighted average number of common shares outstanding (in shares)	65,766	59,979