CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues and other income:
Natural gas, NGLs and oil sales	$ 337,040	$ 304,230	$ 953,006	$ 841,546
Derivative fair value (loss) income	(40,728)	65,761	47,008	77,966
Gain (loss) on the sale of assets	949	203	(12,704)	(1,280)
Other	(2,368)	442	(3,084)	357
Total revenues and other income	294,893	370,636	984,226	918,589
Costs and expenses:
Direct operating	29,628	29,828	85,691	87,054
Transportation, gathering and compression	51,600	32,431	137,164	86,179
Production and ad valorem taxes	8,819	7,317	57,239	21,746
Exploration	14,752	17,606	51,785	56,385
Abandonment and impairment of unproved properties	40,118	16,627	104,048	52,064
General and administrative	44,497	35,907	127,231	108,986
Deferred compensation plan	20,052	8,717	21,555	33,569
Interest expense	43,997	34,181	124,090	90,343
Loss on early extinguishment of debt		(4)		18,576
Depletion, depreciation and amortization	123,059	93,619	332,012	244,129
Impairment of proved properties and other assets	1,281	38,681	1,281	38,681
Total costs and expenses	377,803	314,910	1,042,096	837,712
(Loss) income from continuing operations before income taxes	(82,910)	55,726	(57,870)	80,877
Income tax (benefit) expense
Current		(7)		1
Deferred	(29,074)	22,547	(17,910)	35,345
Total income tax expense	(29,074)	22,540	(17,910)	35,346
(Loss) income from continuing operations	(53,836)	33,186	(39,960)	45,531
Discontinued operations, net of taxes		1,569		15,484
Net (loss) income	$ (53,836)	$ 34,755	$ (39,960)	$ 61,015
(Loss) income per common share:
Basic-(loss) income from continuing operations	$ (0.34)	$ 0.21	$ (0.25)	$ 0.28
-discontinued operations		$ 0.01		$ 0.10
-net (loss) income	$ (0.34)	$ 0.22	$ (0.25)	$ 0.38
Diluted-(loss) income from continuing operations	$ (0.34)	$ 0.20	$ (0.25)	$ 0.28
-discontinued operations		$ 0.01		$ 0.10
-net (loss) income	$ (0.34)	$ 0.21	$ (0.25)	$ 0.38
Dividends per common share	$ 0.04	$ 0.04	$ 0.12	$ 0.12
Weighted average common shares outstanding:
Basic	159,563	158,154	159,297	157,901
Diluted	159,563	159,322	159,297	158,939