Consolidated Statements Of Operations (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Oil and natural gas sales	$ 127,789	$ 127,599
Gain (loss) from oil hedging activities	12,423	(6,755)
Other revenues	0	1,145
Total revenues	140,212	121,989
Costs and expenses:
Lease operating	30,949	27,556
Production tax	8,290	8,624
Depreciation, depletion and amortization	36,932	33,977
General and administrative	13,449	8,008
Other expenses	0	1,082
Total costs and expenses	89,620	79,247
Operating income	50,592	42,742
Non-operating expense:
Interest expense	(24,156)	(23,710)
Non-hedge derivative losses	(10,463)	(60,926)
Loss on extinguishment of debt	0	(20,576)
Other income and expenses	5	47
Net non-operating expense	(34,614)	(105,165)
Income (loss) before income taxes	15,978	(62,423)
Income tax expense (benefit)	6,196	(22,159)
Net income (loss)	$ 9,782	$ (40,264)