2.4.0.82404404 - Disclosure - Summary of Significant Accounting Policies (Schedule of Intangible Assets and Liabilities) (Details)truefalsefalse1false USDfalsefalse$I2013Q2http://www.sec.gov/CIK0001374694instant2013-06-30T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$I2012Q4http://www.sec.gov/CIK0001374694instant2012-12-31T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_FiniteLivedIntangibleAssetsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Finite-Lived Intangible Assets [Line Items]2false 4us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortizationus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1233942-1233942USD$falsetruefalse2truefalsefalse-2483210-2483210USD$falsetruefalsexbrli:monetaryItemTypemonetaryAccumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Intangible Lease Assets, Accumulated Amortization3false 4wellsvaf_FiniteLivedIntangibleAssetsAcquiredInPlaceLeasesAccumulatedAmortizationwellsvaf_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse767509767509USD$falsefalsefalse2truefalsefalse21149132114913USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe accumulated amount of amortization of finite-lived intangible assets for acquired in-place leases.No definition available.false2Intangible lease origination costs, accumulated amortization4false 4us-gaap_FiniteLivedIntangibleAssetsNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse600431600431USD$falsefalsefalse2truefalsefalse809143809143USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Lease Assets, Net5false 4us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeasesus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse331640331640USD$falsefalsefalse2truefalsefalse504396504396USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired.No definition available.true2Intangible Lease Origination Costs, Net6false 4us-gaap_OffMarketLeaseUnfavorableus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse6772067720USD$falsefalsefalse2truefalsefalse9168391683USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Below-Market In-Place Lease Liabilities, Net7false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalse$I2013Q2_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_wellsvaf_AboveMarketInPlaceLeaseAssetsMemberhttp://www.sec.gov/CIK0001374694instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseAbove-Market In-Place Lease Assetsus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisxbrldihttp://xbrl.org/2006/xbrldiwellsvaf_AboveMarketInPlaceLeaseAssetsMemberus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Above-Market In-Place Lease Assets8true 3us-gaap_FiniteLivedIntangibleAssetsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Finite-Lived Intangible Assets [Line Items]9false 4us-gaap_FiniteLivedIntangibleAssetsGrossus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse357971357971USD$falsefalsefalse2truefalsefalse357971357971USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Intangible Lease Assets, Gross10false 4us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortizationus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-249965-249965USD$falsefalsefalse2truefalsefalse-231449-231449USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAccumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Intangible Lease Assets, Accumulated Amortization11false 4us-gaap_FiniteLivedIntangibleAssetsNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse108006108006USD$falsefalsefalse2truefalsefalse126522126522USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Lease Assets, Net12false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5false USDtruefalse$I2013Q2_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_wellsvaf_AbsorptionPeriodCostsMemberhttp://www.sec.gov/CIK0001374694instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseAbsorption Period Costsus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisxbrldihttp://xbrl.org/2006/xbrldiwellsvaf_AbsorptionPeriodCostsMemberus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Absorption Period Costs13true 3us-gaap_FiniteLivedIntangibleAssetsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Finite-Lived Intangible Assets [Line Items]14false 4us-gaap_FiniteLivedIntangibleAssetsGrossus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse14764021476402USD$falsefalsefalse2truefalsefalse29343822934382USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Intangible Lease Assets, Gross15false 4us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortizationus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-983977-983977USD$falsefalsefalse2truefalsefalse-2251761-2251761USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAccumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Intangible Lease Assets, Accumulated Amortization16false 4us-gaap_FiniteLivedIntangibleAssetsNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse492425492425USD$falsefalsefalse2truefalsefalse682621682621USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Lease Assets, Net17false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse7false USDtruefalse$I2013Q2_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_wellsvaf_IntangibleLeaseOriginationCostsMemberhttp://www.sec.gov/CIK0001374694instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseIntangible Lease Origination Costsus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisxbrldihttp://xbrl.org/2006/xbrldiwellsvaf_IntangibleLeaseOriginationCostsMemberus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Intangible Lease Origination Costs18true 3us-gaap_FiniteLivedIntangibleAssetsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Finite-Lived Intangible Assets [Line Items]19false 4wellsvaf_FiniteLivedIntangibleAssetAcquiredInPlaceLeasesGrosswellsvaf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse10991491099149USD$falsefalsefalse2truefalsefalse26193092619309USD$falsefalsefalsexbrli:monetaryItemTypemonetaryFinite-Lived Intangible Asset, Acquired-in-Place Leases, GrossNo definition available.false2Intangible Lease Origination Costs, Gross20false 4wellsvaf_FiniteLivedIntangibleAssetsAcquiredInPlaceLeasesAccumulatedAmortizationwellsvaf_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse767509767509USD$falsefalsefalse2truefalsefalse21149132114913USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe accumulated amount of amortization of finite-lived intangible assets for acquired in-place leases.No definition available.false2Intangible lease origination costs, accumulated amortization21false 4us-gaap_FiniteLivedIntangibleAssetsNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse331640331640USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Lease Assets, Net22false 4us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeasesus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse331640331640USD$falsefalsefalse2truefalsefalse504396504396USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired.No definition available.true2Intangible Lease Origination Costs, Net23false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse9false USDtruefalse$I2013Q2_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_wellsvaf_IntangibleBelowMarketInPlaceLeaseLiabilitiesMemberhttp://www.sec.gov/CIK0001374694instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseIntangible Below-Market In-Place Lease Liabilitiesus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisxbrldihttp://xbrl.org/2006/xbrldiwellsvaf_IntangibleBelowMarketInPlaceLeaseLiabilitiesMemberus-gaap_FiniteLivedIntangibleAssetsByMajorClassAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Intangible Below-Market In-Place Lease Liabilities24true 3us-gaap_FiniteLivedIntangibleAssetsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Finite-Lived Intangible Assets [Line Items]25false 4wellsvaf_OffMarketLeaseUnfavorableGrosswellsvaf_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse224442224442USD$falsefalsefalse2truefalsefalse386472386472USD$falsefalsefalsexbrli:monetaryItemTypemonetaryOff Market Lease, Unfavorable, GrossNo definition available.false2Intangible Below-Market In-Place Lease Liabilities, Gross26false 4wellsvaf_FiniteLivedIntangibleLiabilitiesAccumulatedAmortizationwellsvaf_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedTerseLabel1truefalsefalse-156722-156722USD$falsefalsefalse2truefalsefalse-294789-294789USD$falsefalsefalsexbrli:monetaryItemTypemonetaryFinite-Lived Intangible Liabilities, Accumulated AmortizationNo definition available.false2Intangible Below-Market In-Place Lease Liabilities, Accumulated Amortization27false 4us-gaap_FiniteLivedIntangibleAssetsNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse6772067720USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Lease Assets, Net28false 4us-gaap_OffMarketLeaseUnfavorableus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse6772067720USD$falsetruefalse2truefalsefalse9168391683USD$falsetruefalsexbrli:monetaryItemTypemonetaryThis element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. true2Intangible Below-Market In-Place Lease Liabilities, NetfalseSummary of Significant Accounting Policies (Schedule of Intangible Assets and Liabilities) (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.wellsrefvaf.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfIntangibleAssetsAndLiabilitiesDetails228