Real Estate Fund Investments (Details 1) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Details Of Income From Real Estate Funds [Abstract]
Income from real estate fund investments	$ 16,389	$ 26,368	$ 27,673	$ 50,457
Less income attributable to noncontrolling interests	(13,025)	(19,186)	(22,703)	(35,068)
Fee And Other Income	33,689	39,230	67,659	78,837
Real Estate Fund [Member]
Details Of Income From Real Estate Funds [Abstract]
Net investment income	1,723	2,150	6,396	8,600
Net realized gains on exited investments	0	886	14,676	25,591
Previously recorded unrealized gains on exited investments	0	0	(14,254)	(23,279)
Net unrealized gains on held investments	14,666	23,332	20,855	39,545
Income from real estate fund investments	16,389	26,368	27,673	50,457
Less income attributable to noncontrolling interests	(8,845)	(15,872)	(14,818)	(29,411)
Income from real estate fund investments attributable to Vornado	7,544	10,496	12,855	21,046
Fee And Other Income	$ 935	$ 633	$ 1,695	$ 1,337

The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.2)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 16
-Article 12

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- Definition

Amount after tax of income (loss) attributable to nonredeemable noncontrolling shareholder, unit holder, partner, or other equity holder of a joint venture.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.19)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

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Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations, and other real estate revenue not otherwise specified in the taxonomy.

+ References

No definition available.

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- Definition

This element represents the income (loss) from the Real Estate Fund before allocation to noncontrolling interests

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- Definition

This element represents income from the real estate fund net of amounts attributable to noncontrolling interests

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- Definition

This element represents previously recorded unrealized gains on exited investments.

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No definition available.

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