Real Estate Fund Investments (Narrative) (Details)	6 Months Ended
Jun. 30, 2023 USD ($) investment	Jun. 30, 2020 USD ($)
Real Estate Investments
Investment Holdings
Number of investments held by fund (investment) \| investment	1
Aggregate fair value of real estate fund investments	$ 0
Real estate fund investments below cost	28,815,000
Unfunded commitments of fund	28,465,000
Vornado Realty Trust \| Real Estate Investments
Investment Holdings
Unfunded commitments of fund	$ 8,849,000
Vornado Capital Partners Real Estate Fund
Investment Holdings
Equity method ownership percentage	25.00%
Term of the fund, years	8 years
Investment period for commitments of the Fund, years	3 years
Crowne Plaza Times Square Hotel Joint Venture
Investment Holdings
Default amount		$ 274,355,000
Crowne Plaza Times Square Hotel Joint Venture \| Joint Venture
Investment Holdings
Equity method ownership percentage	57.10%
Crowne Plaza Times Square Hotel Joint Venture \| Joint Venture \| Crowne Plaza Time Square Hotel
Investment Holdings
Ownership percentage by noncontrolling owners	24.30%
Noncontrolling interest, ownership percentage by parent	32.80%

Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

Equity Commitment Fund Term, in years

+ References

No definition available.

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- Definition

The amount of excess fair value of investments over it's cost.

+ References

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Investment Period Fund

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- Definition

Investments Holding

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- Definition

Number Of Investments Held By Fund during the year.

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- Definition

This element represents the real estate assets related to the fund

+ References

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- Definition

Unfunded Commitments Of the Fund

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