XML 61 R46.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Derivatives And Fair Value (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) $ / Boe | Sep. 30, 2018 USD ($) bbl
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative instruments | $ | $ 2.1 | $ 2.1
Benchmark of liability position, with required financial actions | $ | $ 10.0 | $ 10.0
Underlying, Derivative Energy Measure | $ / Boe | 74 |
June 2018 Through June 2019 [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Nonmonetary Notional Amount, Volume | bbl |  | 400,000
Commodity Swaps [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative, Nonmonetary Notional Amount, Volume | bbl |  | 285,000

X
- Definition Benchmark Of Liability Position, With Required Financial Actions + References No definition available. + Details
Name: | egy_BenchmarkOfLiabilityPositionWithRequiredFinancialActions
Namespace Prefix: | egy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 + Details
Name: | us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal volume used to calculate payments on a derivative instrument. + References No definition available. + Details
Name: | us-gaap_DerivativeNonmonetaryNotionalAmountVolume
Namespace Prefix: | us-gaap_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | duration

X
- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in energy volume but not the derivative contract itself. + References No definition available. + Details
Name: | us-gaap_UnderlyingDerivativeEnergyMeasure
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementScenarioAxis=egy_June2018ThroughJune2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |