Area of a real estate property.

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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-Name Accounting Standards Codification
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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

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- Definition

The amount of liabilities reported by an equity method investment of the entity.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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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).

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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- Definition

Debt Instrument Maturity Date (String)

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No definition available.

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- Definition

The term of the extension available, in years

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No definition available.

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The total number of term extensions available to the borrower

+ References

No definition available.

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Investments in Partially Owned Entities (One Park, NY Mezzanine Loan) (Details) ft² in Thousands, $ in Thousands			9 Months Ended
	Mar. 17, 2016 USD ($) Extensions	Mar. 07, 2016 USD ($) ft²	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable			$ 9,867,550	$ 9,513,713
One Park Avenue \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage		55.00%
Square Footage Of Real Estate Property \| ft²		947
One Park Avenue \| Joint Venture \| Mortgage loan at 2.28% Matures March 2021
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable		$ 300,000
Debt Instrument Maturity			March 2021
Spread Over LIBOR (in percentage)		1.75%
Interest Rate, End of Period (in percentage)			2.28%
One Park Avenue \| Joint Venture \| Mortgage loan at 4.995% Matures March 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable		$ 250,000
Debt Instrument Maturity		March 2016
Interest Rate, End of Period (in percentage)		4.995%
Mezzanine Loan New York \| Joint Venture
Schedule Of Equity Method Investments [Line Items]
Equity method ownership percentage	33.30%
Mezzanine Loan New York \| Joint Venture \| Mortgage loan at 9.38% Matures November 2016
Schedule Of Equity Method Investments [Line Items]
Notes And Loans Payable	$ 146,004
Debt Instrument Maturity	November 2016
Number Of Extensions Available \| Extensions	2
Length Of Extension Available	3 months
Spread Over LIBOR (in percentage)	8.875%
Interest Rate, End of Period (in percentage)			9.38%
Mezzanine Loan New York \| Joint Venture \| London Interbank Offered Rate (LIBOR)
Schedule Of Equity Method Investments [Line Items]
Remaining committment			$ 3,996
Our share of remaining commitment			1,332
Subordinated Debt			$ 350,000