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Fair Value (Schedule Of Carrying Amounts And Fair Values Of Financial Assets/Liabilities) (Details) (USD $)
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3 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2014
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 1 [Member]
NYMEX Commodity Contracts [Member]
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Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 1 [Member]
NYMEX Commodity Contracts [Member]
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Jun. 30, 2014
Fair Value, Measurements, Recurring [Member]
Significant Other Observable Inputs (Level 2) [Member]
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Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Significant Other Observable Inputs (Level 2) [Member]
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Jun. 30, 2014
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 3 [Member]
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Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 3 [Member]
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Jun. 30, 2014
Certain Pipeline [Member]
Pipelines [Member]
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Jun. 30, 2014
Reported Value Measurement [Member]
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Dec. 31, 2013
Reported Value Measurement [Member]
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Jun. 30, 2014
Reported Value Measurement [Member]
NYMEX Commodity Contracts [Member]
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Dec. 31, 2013
Reported Value Measurement [Member]
NYMEX Commodity Contracts [Member]
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Jun. 30, 2014
Reported Value Measurement [Member]
Certain Pipeline [Member]
Pipelines [Member]
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Jun. 30, 2014
Estimate of Fair Value Measurement [Member]
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Dec. 31, 2013
Estimate of Fair Value Measurement [Member]
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Jun. 30, 2014
Estimate of Fair Value Measurement [Member]
NYMEX Commodity Contracts [Member]
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Dec. 31, 2013
Estimate of Fair Value Measurement [Member]
NYMEX Commodity Contracts [Member]
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Jun. 30, 2014
Estimate of Fair Value Measurement [Member]
Certain Pipeline [Member]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Inputs, Level 3 [Member]
Pipelines [Member]
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||||||||
| Derivative liability | $ (14,657,000) | $ (4,502,000) | $ (14,657,000) | $ (4,502,000) | $ (14,657,000) | $ (4,502,000) | |||||||||||
| Long-term receivables | 31,451,000 | 2,658,000 | 30,028,000 | 2,730,000 | 31,451,000 | 2,658,000 | |||||||||||
| Debt | (3,175,687,000) | (2,815,210,000) | (2,910,496,000) | (2,685,287,000) | (3,175,687,000) | (2,815,210,000) | |||||||||||
| Other Asset Impairment Charges | 9,400,000 | ||||||||||||||||
| Property, Plant, and Equipment, Fair Value Disclosure | $ 10,000,000 | $ 10,000,000 | |||||||||||||||