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Shareholders Equity (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Accumulated other comprehensive (loss) income, Beginning Balance $ 71,537us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Net current period OCI 21,730us-gaap_OtherComprehensiveIncomeLossNetOfTax
Accumulated other comprehensive (loss) income, Ending Balance 93,267us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Interest rate Swap [Member]  
Accumulated other comprehensive (loss) income, Beginning Balance (31,882)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
Net current period OCI 6,079us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
Accumulated other comprehensive (loss) income, Ending Balance (25,803)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
Securities available for sale [Member]  
Accumulated other comprehensive (loss) income, Beginning Balance 119,309us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Net current period OCI 14,465us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Accumulated other comprehensive (loss) income, Ending Balance 133,774us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember
Pro Rata Share Of Non Consolidated Subsidiaries Oci [Member]  
Accumulated other comprehensive (loss) income, Beginning Balance (11,501)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= vno_ProRataShareOfNonConsolidatedSubsidiariesOciMember
Net current period OCI 2,509us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= vno_ProRataShareOfNonConsolidatedSubsidiariesOciMember
Accumulated other comprehensive (loss) income, Ending Balance (8,992)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= vno_ProRataShareOfNonConsolidatedSubsidiariesOciMember
Other [Member]  
Accumulated other comprehensive (loss) income, Beginning Balance (4,389)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= vno_OtherChangesInAccumulatedComprehensiveIncomeLossMember
Net current period OCI (1,323)us-gaap_OtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= vno_OtherChangesInAccumulatedComprehensiveIncomeLossMember
Accumulated other comprehensive (loss) income, Ending Balance $ (5,712)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= vno_OtherChangesInAccumulatedComprehensiveIncomeLossMember