CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities
Net income (loss)	$ (104,976)	$ 42,604
Adjustments to reconcile net income (loss) to net cash provided by operating activities from continuing operations:
Income from discontinued operations before income taxes		(36,832)
Gain on sale of discontinued operations before income taxes		(84,740)
Non-cash portion of loss on extinguishment of debt	22,456
Depreciation, depletion and amortization	113,224	95,358
Impairments	71,071	36,251
Derivative contracts:
Net gains	(19,827)	(44,410)
Cash settlements	20,302	24,287
Deferred income tax benefit	(60,372)	6,149
Gain on sales of property and equipment, net	(223)	(151)
Dry hole and unproved leasehold expense	52,457	26,501
Non-cash interest expense	5,812	9,089
Share-based compensation	5,629	6,400
Other, net	225	(341)
Changes in operating assets and liabilities, net	(2,614)	(11,290)
Net cash provided by operating activities from continuing operations	103,164	68,875
Cash flows from investing activities
Capital expenditures - property and equipment	(318,274)	(313,710)
Proceeds from the sale of PVG units, net		139,120
Proceeds from sales of property and equipment, net	31,077	25,172
Other, net	100	1,192
Net cash used in investing activities for continuing operations	(287,097)	(148,226)
Cash flows from financing activities
Dividends paid	(7,736)	(7,700)
Proceeds from revolving credit facility borrowings	30,000
Repayment of revolving credit facility borrowings	(15,000)
Proceeds from the issuance of Senior Notes due 2019	300,000
Repurchase of Convertible Notes	(232,963)
Debt issuance costs paid	(8,850)
Proceeds from the sale of PVG units, net		199,125
Distributions received from discontinued operations		11,218
Other, net	1,148	2,143
Net cash provided by financing activities from continuing operations	66,599	204,786
Cash flows from discontinued operations
Net cash provided by operating activities		77,759
Net cash used in investing activities		(18,112)
Net cash used in financing activities		(59,647)
Net cash provided by discontinued operations
Net increase (decrease) in cash and cash equivalents	(117,334)	125,435
Cash and cash equivalents - beginning of period	120,911	79,017
Cash and cash equivalents - end of period	3,577	204,452
Cash paid for:
Interest (net of amounts capitalized)	17,288	22,646
Income taxes (net of refunds received)	$ 433	$ 25,168