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Fair Value Measurements (Fair Value of Liabilities Measured on Nonrecurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | 1 Months Ended | 12 Months Ended | 3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Fair Value, Measurements, Nonrecurring [Member]
Level 3 [Member]
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May 31, 2011
Callon Entrada [Member]
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Dec. 31, 2012
Callon Entrada [Member]
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Dec. 31, 2011
Callon Entrada [Member]
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Jun. 30, 2011
Callon Entrada [Member]
Fair Value, Measurements, Nonrecurring [Member]
Deepwater_Project
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Apr. 29, 2011
Callon Entrada [Member]
Fair Value, Measurements, Nonrecurring [Member]
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Apr. 29, 2011
Callon Entrada [Member]
Fair Value, Measurements, Nonrecurring [Member]
Level 2 [Member]
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Apr. 29, 2011
Callon Entrada [Member]
Fair Value, Measurements, Nonrecurring [Member]
Level 3 [Member]
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Apr. 29, 2011
Callon Entrada [Member]
Fair Value, Measurements, Nonrecurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||||||||||||
| Asset Retirement Obligation, Fair Value Disclosure | $ 81 | |||||||||||
| Business Combination, Percentage of Assets Acquired | 100.00% | |||||||||||
| Business Combination, Number of Assets Acquired (in deepwater projects) | 1 | |||||||||||
| Property, Plant, and Equipment, Fair Value Disclosure | 3,954 | 7,395 | 11,349 | |||||||||
| Liabilities Assumed | 2,681 | |||||||||||
| Loss on Sale of Assets and Asset Impairment Charges | (1,177) | 0 | 0 | (1,177) | ||||||||
| Percentage of Equipment Obtained in Connection with Settlement | 50.00% | |||||||||||
| Adjustment to Full Cost Pool, Percentage of Equipment Already Held | 50.00% | |||||||||||
| Assets Held-for-sale, at Carrying Value | $ 3,634 | $ 6,514 | ||||||||||