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Derivatives (Schedule Of Open Forward Positions On Outstanding Put Agreements) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Derivative [Line Items]
Current Asset Fair Value	$ 2	$ 142
1st Qtr 2012 [Member]
Derivative [Line Items]
Current Asset Fair Value		2
2nd Qtr 2012 [Member]
Derivative [Line Items]
Current Asset Fair Value		23
3rd Qtr 2012 [Member]
Derivative [Line Items]
Current Asset Fair Value		48
4th Qtr 2012 [Member]
Derivative [Line Items]
Current Asset Fair Value	$ 2	$ 69
Scenario, Forecast [Member] | 1st Qtr 2012 [Member]
Derivative [Line Items]
Monthly Volume		10,000
Total Quarterly Volume		30,000
Floor NYMEX		65.00
Scenario, Forecast [Member] | 2nd Qtr 2012 [Member]
Derivative [Line Items]
Monthly Volume		10,000
Total Quarterly Volume		30,000
Floor NYMEX		65.00
Scenario, Forecast [Member] | 3rd Qtr 2012 [Member]
Derivative [Line Items]
Monthly Volume		10,000
Total Quarterly Volume		30,000
Floor NYMEX		65.00
Scenario, Forecast [Member] | 4th Qtr 2012 [Member]
Derivative [Line Items]
Monthly Volume	10,000	10,000
Total Quarterly Volume	30,000	30,000
Floor NYMEX	65.00	65.00

X

- Definition

Derivative Underlying Quantity Monthly Volume

+ References

No definition available.

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X

- Definition

Derivative underlying quantity quarterly volume.

+ References

No definition available.

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- Definition

Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FIN39-1

-Paragraph 10A, 10B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Assets

-URI http://asc.fasb.org/extlink&oid=6509628



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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 4, 17

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 43

-Section A

-Paragraph 4

-Chapter 3

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Accounting Standards Codification

-Topic 815

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X

- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

No definition available.

+ Details

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