Area of a real estate property.

No definition available.

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- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 51

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- Definition

The amount of acquisition cost of a business combination allocated to assets acquired.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

Amount of acquisition cost of a business combination allocated to buildings included in real estate.

+ References

No definition available.

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- Definition

Amount of acquisition cost of a business combination allocated to land included in real estate.

+ References

No definition available.

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- Definition

The effective interest rate at the end of the reporting period.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

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-Subparagraph (SX 210.5-02.22(a)(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.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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-Publisher FASB

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-Section 50

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

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-Article 7

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

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- Definition

The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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- Definition

Cash received on stock transaction after deduction of issuance costs.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

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- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

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- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 5A

-Subparagraph (d)

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- Definition

Intital term to maturity for a debt instrument

+ References

No definition available.

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- Definition

Percentage of equity method of investments sold.

+ References

No definition available.

+ Details

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- Definition

This element represents Number Of Story In Office Tower

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No definition available.

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Investments in Partially Owned Entities (Details 1) (USD $) In Thousands, unless otherwise specified			0 Months Ended			0 Months Ended										0 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Jun. 07, 2013 Independence Plaza [Member]	Dec. 21, 2012 Independence Plaza [Member] Residential	Dec. 31, 2012 Independence Plaza [Member]	Jun. 07, 2013 Independence Plaza [Member] Vornado Realty Trust [Member]	Jun. 07, 2013 Independence Plaza [Member] Five year interest only loan bearing interest rate of 3.48%	Dec. 31, 2012 Independence Plaza [Member] Land [Member]	Dec. 21, 2012 Independence Plaza [Member] Land [Member]	Dec. 31, 2012 Independence Plaza [Member] Building Improvements [Member]	Dec. 21, 2012 Independence Plaza [Member] Building Improvements [Member]	Dec. 31, 2012 Independence Plaza [Member] Acquired above-market leases (included in identified intangible assets) [Member]	Dec. 31, 2012 Independence Plaza [Member] Acquired in-place leases (included in identified intangible assets) [Member]	Dec. 31, 2012 Independence Plaza [Member] Other Assets [Member]	Dec. 31, 2012 Independence Plaza [Member] Acquired below-market leases (included in deferred revenue) [Member]	Sep. 30, 2013 Madison Avenue 650 [Member] Story sqft	Sep. 30, 2013 Madison Avenue 650 [Member] Office Space [Member] sqft	Sep. 30, 2013 Madison Avenue 650 [Member] Retails Space [Member] sqft
Business Acquisition [Line Items]
Variable Interest Entity Ownership Percentage				58.75%
Number of Units in Real Estate Property				1,328
Purchase Price Allocation, Land									$ 309,848
Purchase Price Allocation, Buildings											527,578
Purchase Price Allocation, Assets Acquired					844,800			602,662		252,844		13,115	67,879	7,374	(99,074)
Equity method ownership percentage																20.10%
Number Of Story In Office Tower																27
Square Footage Of Real Estate Property																594,000	523,000	71,000
Cost Of Acquired Entity Purchase Price																1,295,000
Debt Instruments [Abstract]
Mortgages payable	8,566,582	8,644,200	323,000				550,000									800,000
Debt Term							5 years									7 years
Interest Rate, End of Period							3.48%									4.39%
Net proceeds after repaying the existing loan and closing costs			219,000			137,000
Equity Method Investment, Ownership Percentage Sold			8.65%
Sale of economic interest, value			$ 41,000
Vornado's economic interest in subsidiary after sale			50.10%