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Commitments And Contingencies (Estimated Obligations And Companies Share For The Annual Charter Payment) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | 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. |  |
Estimated obligation and company share for annual charter payment |  |
Annual charter payment, 2019 | $ 9,718 |
Annual charter payment, 2020 | 7,029 |
Annual charter payment, 2021 |  |
Annual charter payment, 2022 |  |
Annual charter payment, 2023 |  |
Annual charter payment, Total | 16,747 |
Full Charter Payment [Member] |  |
Estimated obligation and company share for annual charter payment |  |
Annual charter payment, 2019 | 31,294 |
Annual charter payment, 2020 | 22,634 |
Annual charter payment, 2021 |  |
Annual charter payment, 2022 |  |
Annual charter payment, 2023 |  |
Annual charter payment, Total | $ 53,928 |

X
- 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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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contractual obligation due in the fifth 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 fourth 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 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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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | instant

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_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

X
- Details
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Balance Type: |
Period Type: |