Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Natural gas, NGL and crude oil sales	$ 75,310	$ 58,810
Sales from natural gas marketing	11,834	15,202
Commodity price risk management gain, net	11,501	(23,882)
Well operations, pipeline income and other	1,701	1,843
Total revenues	100,346	51,973
Costs, expenses and other:
Production costs	19,189	18,472
Cost of natural gas marketing	11,492	14,993
Exploration expense	2,063	1,669
Impairment of natural gas and crude oil properties	653	453
General and administrative expense	14,708	13,873
Depreciation, depletion and amortization	39,814	30,985
Gain on sale of properties and equipment	(154)	0
Total costs, expenses and other	87,765	80,445
Income from operations	12,581	(28,472)
Interest income	2	9
Interest expense	(10,444)	(9,062)
Income from continuing operations before income taxes	2,139	(37,525)
Provision (benefit) for income taxes	759	(14,278)
Income from continuing operations	1,380	(23,247)
Income (loss) from discontinued operations, net of tax	14,455	3,323
Net income attributable to shareholders	$ 15,835	$ (19,924)
Basic
Income from continuing operations	$ 0.06	$ (0.99)
Income (loss) from discontinued operations	$ 0.61	$ 0.14
Net income attributable to shareholders	$ 0.67	$ (0.85)
Diluted
Income from continuing operations	$ 0.06	$ (0.99)
Income (loss) from discontinued operations	$ 0.60	$ 0.14
Net income attributable to shareholders	$ 0.66	$ (0.85)
Weighted average common shares outstanding
Basic	23,609	23,428
Diluted	23,889	23,428