Consolidated statements of operations (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Commodity sales	$ 192,976	$ 144,353	$ 366,315	$ 271,865
Gain from oil hedging activities	0	9,509	0	19,512
Total revenues	192,976	153,862	366,315	291,377
Costs and expenses:
Lease operating	36,564	32,949	71,585	66,926
Production taxes	8,159	8,588	14,802	16,468
Depreciation, depletion & amortization	63,354	47,941	119,104	91,857
General and administrative	14,992	11,553	28,379	25,561
Total costs and expenses	123,069	101,031	233,870	200,812
Operating income	69,907	52,831	132,445	90,565
Non-operating (expense) income:
Interest expense	(26,203)	(24,200)	(52,662)	(48,491)
Non-hedge derivative (losses) gains	(57,996)	32,892	(87,195)	17,346
Other income, net	805	187	965	413
Net non-operating (expense) income	(83,394)	8,879	(138,892)	(30,732)
(Loss) income before income taxes	(13,487)	61,710	(6,447)	59,833
Income tax (benefit) expense	(5,054)	22,810	(2,419)	22,123
Net (loss) income	$ (8,433)	$ 38,900	$ (4,028)	$ 37,710