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Commitments And Contingencies (Estimated Obligations And Companies Share For The Annual Charter Payment) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Jun. 30, 2016
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Estimated obligation and company share for annual charter payment |  |
Annual charter payment, Total |  | $ 5,100
VAALCO ENERGY, INC. [Member] |  |
Estimated obligation and company share for annual charter payment |  |
Annual charter payment, 2018 | $ 9,719 |
Annual charter payment, 2019 | 9,719 |
Annual charter payment, 2020 | 7,029 |
Annual charter payment, Total | 26,467 |
Full Charter Payment [Member] |  |
Estimated obligation and company share for annual charter payment |  |
Annual charter payment, 2018 | 31,294 |
Annual charter payment, 2019 | 31,294 |
Annual charter payment, 2020 | 22,634 |
Annual charter payment, Total | $ 85,222 |

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- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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- Definition Amount of contractual obligation due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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X
- Definition Amount of contractual obligation due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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X
- Definition Amount of contractual obligation due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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X
- Details
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Period Type: |

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