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Asset Retirement Obligations (Narrative) (Detail) - Etame [Member] | 12 Months Ended
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Dec. 31, 2014 item
Asset Retirement Obligation [Line Items] |
Number of new platforms, asset retirement obligations added | 2
Number of new wells, asset retirement obligations added | 2

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- Definition Asset Retirement Obligation [Line Items] + References No definition available. + Details
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- Definition Number Of New Platforms, Asset Retirement Obligations Added + References No definition available. + Details
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Namespace Prefix: | egy_
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- Definition Number Of New Wells, Asset Retirement Obligations Added + References No definition available. + Details
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Namespace Prefix: | egy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |