XML 41 R50.htm IDEA: XBRL DOCUMENT v2.4.1.9
Accumulated Other Comprehensive Income/(Loss) (Reconciliation Of Amounts Contained In Accumulated Other Comprehensive Income) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Accumulated other comprehensive income    
Beginning of period $ (59)vgz_AccumulatedOtherComprehensiveIncomeLoss $ 2vgz_AccumulatedOtherComprehensiveIncomeLoss
Decreases to fair market value during period 21us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax [1] 268us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax (24)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax [2] (54)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax [1]
Reclassifications Due To Write Down Of Marketable Securities 73vgz_ReclassificationsDueToWriteDownOfMarketableSecurities (275)vgz_ReclassificationsDueToWriteDownOfMarketableSecurities
End of period 11vgz_AccumulatedOtherComprehensiveIncomeLoss (59)vgz_AccumulatedOtherComprehensiveIncomeLoss
Accumulated other comprehensive income, net of tax    
Beginning of period (50)vgz_AccumulatedOtherComprehensiveIncomeNetOfTax 2vgz_AccumulatedOtherComprehensiveIncomeNetOfTax
Decreases to fair market value during period 18us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetOfTax [1] 228us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetOfTax
Decreases due to realization of a gain (24)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax [2] (54)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax [1]
Accumulated other comprehensive income, net of tax due to change in fair market value (20)vgz_AccumulatedOtherComprehensiveIncomeNetOfTaxDueToChangeInFairMarketValue [2] (46)vgz_AccumulatedOtherComprehensiveIncomeNetOfTaxDueToChangeInFairMarketValue [1]
Reclassifications Due To Write Down Of Marketable Securities Accumulated Other Comprehensive Income Net Of Tax 62vgz_ReclassificationsDueToWriteDownOfMarketableSecuritiesAccumulatedOtherComprehensiveIncomeNetOfTax (234)vgz_ReclassificationsDueToWriteDownOfMarketableSecuritiesAccumulatedOtherComprehensiveIncomeNetOfTax
End of period $ 10vgz_AccumulatedOtherComprehensiveIncomeNetOfTax $ (50)vgz_AccumulatedOtherComprehensiveIncomeNetOfTax
[1] Reclassified to gain/(loss) on sale of marketable securities on the Consolidated Statement of Income/(Loss) and Comprehensive Income/(Loss).
[2] Reclassified to write-down of marketable securities on the Consolidated Statement of Income/(Loss) and Comprehensive Income/(Loss).