CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating revenue:
Oil production	$ 123,795	$ 186,608	$ 404,477	$ 558,031
Gas production	30,154	52,728	133,183	137,382
Natural gas liquids production	21,014	16,476	64,920	36,854
Other operational income	2,468	873	5,515	2,659
Derivative income, net	5,782		2,667
Total operating revenue	183,213	256,685	610,762	734,926
Operating expenses:
Lease operating expenses	43,561	53,986	139,918	157,547
Transportation, processing and gathering expenses	16,721	13,081	45,445	27,374
Production taxes	3,651	5,224	9,970	11,404
Depreciation, depletion and amortization	80,291	92,853	255,772	255,497
Write-down of oil and gas properties	47,130		47,130
Accretion expense	6,539	8,431	21,827	25,012
Salaries, general and administrative expenses	16,286	14,201	49,252	43,351
Incentive compensation expense	3,092	4,566	10,129	8,047
Other operational expenses	298	237	510	382
Derivative expense, net		1,684		1,537
Total operating expenses	217,569	194,263	579,953	530,151
Income (loss) from operations	(34,356)	62,422	30,809	204,775
Other (income) expenses:
Interest expense	10,323	7,922	28,593	26,452
Interest income	(169)	(1,311)	(505)	(1,543)
Other income	(695)	(782)	(2,124)	(2,190)
Other expense	95		274
Total other (income) expenses	9,554	5,829	26,238	22,719
Income (loss) before income taxes	(43,910)	56,593	4,571	182,056
Provision (benefit) for income taxes:
Current		(88)		(10,827)
Deferred	(14,495)	20,579	3,599	77,001
Total income taxes	(14,495)	20,491	3,599	66,174
Net income (loss)	$ (29,415)	$ 36,102	$ 972	$ 115,882
Basic earnings (loss) per share	$ (0.54)	$ 0.72	$ 0.02	$ 2.32
Diluted earnings (loss) per share	$ (0.54)	$ 0.72	$ 0.02	$ 2.32
Average shares outstanding	54,866	48,732	51,998	48,680
Average shares outstanding assuming dilution	54,866	48,776	52,139	48,720