Consolidated statements of operations (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Commodity sales	$ 173,339	$ 127,512
Gain from oil hedging activities	0	10,003
Total revenues	173,339	137,515
Costs and expenses:
Lease operating	35,021	33,977
Production taxes	6,643	7,880
Depreciation, depletion & amortization	55,750	43,916
General and administrative	13,387	14,008
Total costs and expenses	110,801	99,781
Operating income	62,538	37,734
Non-operating income (expense):
Interest expense	(26,459)	(24,291)
Non-hedge derivative losses	(29,199)	(15,546)
Other income, net	160	226
Net non-operating expense	(55,498)	(39,611)
Income (loss) before income taxes	7,040	(1,877)
Income tax expense (benefit)	2,635	(687)
Net income (loss)	$ 4,405	$ (1,190)