CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities
Net income (loss)	$ 8,102	$ (140,721)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss on Extinguishment of Debt	0	29,157
Depreciation, depletion and amortization	215,623	178,355
Asset Impairment Charges	123,992	132,224
Accretion of firm transportation obligation	991	1,263
Derivative contracts:
Net losses (gains)	(8,130)	23,208
Cash settlements, net	(17,836)	1,625
Deferred income tax benefit	(339)	(75,577)
(Gain) loss on sales of assets, net	(120,295)	479
Non-cash exploration expense	8,387	14,167
Non-cash interest expense	3,114	2,846
Share-based compensation (equity-classified)	2,638	4,781
Other, net	325	198
Changes in operating assets and liabilities, net	(16,122)	52,829
Net cash provided by operating activities	200,450	224,834
Cash flows from investing activities
Payments to Acquire Businesses, Net of Cash Acquired	0	(358,239)
Payments To Settle Obligations Assumed In Acquisition Net	33,712	(43,023)
Capital expenditures – property and equipment	(545,031)	(356,964)
Proceeds from Sale of Productive Assets	311,913	653
Net cash used in investing activities	(199,406)	(757,573)
Cash flows from financing activities
Proceeds from Issuance of Convertible Preferred Stock	313,330	0
Payments Made To Induce Conversion Of Preferred Stock	(4,256)	0
Proceeds from Issuance of Senior Long-term Debt	0	775,000
Repayments of Debt	0	(319,090)
Proceeds from revolving credit facility borrowings	377,000	219,000
Repayment of revolving credit facility borrowings	(583,000)	(91,000)
Payments of Debt Issuance Costs	(151)	(25,199)
Dividends paid on preferred stock	(5,165)	(5,137)
Other, net	1,414	(164)
Net cash provided by financing activities	99,172	553,410
Net increase in cash and cash equivalents	100,216	20,671
Cash and cash equivalents - beginning of period	23,474	17,650
Cash and cash equivalents - end of period	123,690	38,321
Cash paid for:
Interest	47,778	24,251
Income taxes	$ 100	$ 0