Consolidated Statement of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues [Abstract]
Natural gas sales	$ 164,226	$ 228,573	$ 348,020	$ 500,111
Oil sales	43,772	67,490	79,286	122,250
Oil and Gas Revenue	207,998	296,063	427,306	622,361
Operating Expenses [Abstract]
Lease operating expenses	27,785	22,959	53,896	43,972
LGS operating lease expense	5,162	5,076	10,323	10,153
Production taxes	17,184	24,594	37,079	50,525
Gathering fees	22,488	13,449	42,245	26,157
Transportation charges	21,076	17,273	41,267	37,848
Depletion, depreciation and amoritzation	92,366	65,341	186,956	128,522
General and administrative	2,422	2,158	6,062	8,503
Costs and Expenses	188,483	150,850	377,828	305,680
Operating Income (Loss)	19,515	145,213	49,478	316,681
Other Nonoperating Income (Expense) [Abstract]
Interest Expense, Debt	(42,619)	(27,294)	(85,287)	(54,362)
Gain (loss) on commodity derivatives	(3,646)	(15,102)	33,219	(60,375)
Deferred gain on sale of liquids gathering system	2,638	2,638	5,276	5,276
Litigation expense	(736)	0	(4,401)	0
Other income (expense) net	(75)	50	(39)	2
Other Nonoperating Income (Expense)	(44,438)	(39,708)	(51,232)	(109,459)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest	(24,923)	105,505	(1,754)	207,222
Income Tax Expense (Benefit)	(250)	(544)	(2,272)	(541)
Net Income (Loss)	$ (24,673)	$ 106,049	$ 518	$ 207,763
Earnings Per Share, Basic [Abstract]
Earnings Per Share, Basic	$ (0.16)	$ 0.69	$ 0	$ 1.36
Fully Diluted Earnings per Share:
Earnings Per Share, Diluted	$ (0.16)	$ 0.68	$ 0	$ 1.34
Weighted Average Number of Shares Outstanding, Basic	153,218	153,179	153,130	153,110
Weighted Average Number of Shares Outstanding, Diluted	153,218	155,007	154,737	154,915