CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities
Net income (loss)	$ (98,258)	$ 72,763
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 dicontinued operations before income taxes		(84,740)
Non-cash portion of loss on extinguishment	21,822
Depreciation, depletion and amortization	67,879	62,134
Impairments	71,071	1,124
Derivative contracts:
Net gains	(8,329)	(29,297)
Cash settlements	11,775	17,484
Deferred income tax benefit	(54,247)	(7,733)
Loss (gain) on the sale of property and equipment, net	(452)	129
Dry hole and unproved leasehold expense	41,081	9,518
Non-cash interest expense	4,750	6,220
Share-based compensation	3,809	4,689
Other, net	265	(462)
Changes in operating assets and liabilities, net	2,593	30,672
Net cash provided by operating activities from continuing operations	63,759	45,669
Cash flows from investing activities
Capital expenditures - property and equipment	(211,081)	(168,081)
Proceeds from the sale of PVG units, net		139,120
Proceeds from the sale of property and equipment, net	696	23,277
Other, net	100	1,192
Net cash used in investing activities for continuing operations	(210,285)	(4,492)
Cash flows from financing activities
Dividends paid	(5,156)	(5,131)
Proceeds from the issuance of Senior Notes due 2019	300,000
Repurchase of Convertible Notes	(232,963)
Debt issuance costs paid	(6,559)
Proceeds from the sale of PVG units, net		199,125
Distributions received from discontinued operations		11,218
Other, net	974	1,844
Net cash provided by financing activities from continuing operations	56,296	207,056
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	(90,230)	248,233
Cash and cash equivalents - beginning of period	120,911	79,017
Cash and cash equivalents - end of period	30,681	327,250
Cash paid for:
Interest (net of amounts capitalized)	19,705	20,975
Income taxes (net of refunds received)	$ (96)	$ 3,150

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Cash Settlements Derivatives, Operating Activities

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Gain (Loss) on Extinguishment of Debt Before Transaction Costs

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Payments For Exchange Of Convertible Notes

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The cash inflow from borrowing associated with the Senior Notes.

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The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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The increase (decrease) during the reporting period in cash and cash equivalents. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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The component of income tax expense for the period representing the increase (decrease) in the entity's deferred tax assets and liabilities pertaining to continuing operations.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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Pretax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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The adjustment to expense previously capitalized costs of drilling exploratory wells when proved reserves are not found or when the entity obtains information that raises substantial doubt about the economic or operational viability of the project.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss).

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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The increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets and liabilities, other noncurrent assets and liabilities, or a combination of other current and noncurrent assets and liabilities.

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- Definition

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.

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- Definition

the increase (decrease) in cash associated with the entity's discontinued operations.

+ References

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The net cash from (used in) the entity's financing activities specifically EXCLUDING the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in financing activities. Such reporting would necessitate the entity to use the Net Cash provided by or used in Discontinued Operations, Total element provided in the taxonomy.

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The net cash from (used in) the entity's investing activities specifically EXCLUDING the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in investing activities. Such reporting would necessitate the entity to use the Net Cash provided by or used in Discontinued Operations, Total element provided in the taxonomy.

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The net cash from (used in) the entity's continuing operations. This element specifically EXCLUDES the cash flows derived by the entity from its discontinued operations, if any. This element is only to be used when the entity reports its cash flows attributable to discontinued operations separately from the cash flow provided by or used in operating activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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- Definition

Other expenses or losses included in net income that result in no cash outflows or inflows in the period and are not separately disclosed.

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Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed.

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- Definition

The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

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-Publisher FASB
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- Definition

The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders.

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Period Type:	duration

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

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- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

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- Definition

The cash inflow from other equity not otherwise defined in the taxonomy.

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- Definition

The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.

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- Definition

The proceeds from the sale of an interest in a unit of partnership.

+ References

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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