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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

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- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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- Definition

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
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- Definition

The term of the extension available, in years

+ References

No definition available.

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- Definition

Number Of Revolving Credit Facility

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No definition available.

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- Definition

Number of Extensions

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No definition available.

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Debt (Narrative) (Details) ft² in Thousands	Sep. 27, 2019 USD ($) ft²	Sep. 05, 2019 USD ($) ft²	Sep. 04, 2019 USD ($)	May 24, 2019 USD ($) ft²	Mar. 26, 2019 USD ($)	Mar. 25, 2019 USD ($) credit_facility	Mar. 01, 2019 USD ($)	Feb. 12, 2019 USD ($) ft² extension	Feb. 11, 2019 USD ($)	Feb. 04, 2019 USD ($) ft²	Feb. 03, 2019 USD ($)	Dec. 31, 2019 USD ($)	May 23, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument
Unsecured revolving credit facilities												$ 575,000,000		$ 80,000,000
Senior Unsecured Notes
Debt Instrument
Debt instrument, interest rate, effective percentage												3.50%
Senior Unsecured Notes Due 2022 \| Senior Unsecured Notes
Debt Instrument
Debt instrument, interest rate, stated percentage							5.00%					5.00%
Debt instrument, redeemed							$ 400,000,000					$ 400,000,000
Debt instrument, redemption price, percentage							105.51%
Charge related to prepayment and unamortized financing costs												$ 22,540,000
Retail \| 435 Seventh Avenue \| Maturing in February 2024
Debt Instrument
Refinancing										$ 95,700,000
Square footage of real estate property (in sqft) \| ft²										43
Debt instrument, interest rate, effective percentage												3.00%
Retail \| 435 Seventh Avenue \| Maturing in February 2024 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)										1.30%
Retail \| 435 Seventh Avenue \| Maturing in August 2019
Debt Instrument
Repayments of debt											$ 95,700,000
Retail \| 435 Seventh Avenue \| Maturing in August 2019 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)											2.25%
Retail \| 100 West 33rd Street \| Maturing in April 2024
Debt Instrument
Square footage of real estate property (in sqft) \| ft²								256
Retail \| 100 West 33rd Street \| Maturing in April 2024 \| LIBOR
Debt Instrument
Length of extension available (years)								1 year
Office and Retail Property \| 100 West 33rd Street \| Maturing in April 2024
Debt Instrument
Refinancing								$ 580,000,000
Square footage of real estate property (in sqft) \| ft²								1,100
Debt instrument, interest rate, effective percentage												3.25%
Number of extensions (extension) \| extension								2
Office and Retail Property \| 100 West 33rd Street \| Maturing in April 2024 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)								1.55%
Office and Retail Property \| 100 West 33rd Street \| Maturing in July 2020
Debt Instrument
Repayments of debt									$ 580,000,000
Office and Retail Property \| 100 West 33rd Street \| Maturing in July 2020 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)									1.65%
Office and Retail Property \| 606 Broadway \| Matures in 2024
Debt Instrument
Refinancing		$ 75,000,000										$ 67,804,000
Square footage of real estate property (in sqft) \| ft²		36
Debt instrument, interest rate, stated percentage												3.52%
Office and Retail Property \| 606 Broadway \| Matures in 2024 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)		1.80%
Office and Retail Property \| 606 Broadway \| Matures in 2021
Debt Instrument
Refinancing			$ 65,000,000
Office and Retail Property \| 606 Broadway \| Matures in 2021 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)			3.00%
Office Space \| 100 West 33rd Street \| Maturing in April 2024
Debt Instrument
Square footage of real estate property (in sqft) \| ft²								859
Office Building \| 888 Seventh Avenue \| Maturing in December 2025
Debt Instrument
Refinancing				$ 375,000,000
Square footage of real estate property (in sqft) \| ft²				885
Debt instrument, interest rate, effective percentage												3.44%
Office Building \| 888 Seventh Avenue \| Maturing in December 2025 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)				1.70%
Office Building \| 888 Seventh Avenue \| Fixed Through December 2020
Debt Instrument
Refinancing													$ 375,000,000
Debt instrument, interest rate, stated percentage													3.25%
Office Building \| PENN2 \| Matures in December 2021
Debt Instrument
Square footage of real estate property (in sqft) \| ft²	1,795
Repayments of loan	$ 575,000,000
Interest Rate Cap \| Office and Retail Property \| 606 Broadway \| Matures in 2024 \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)		4.00%
606 Broadway \| Joint Venture
Debt Instrument
Equity method ownership percentage		50.00%
Revolving Credit Facility \| Maturing in March 2024 \| Line of Credit
Debt Instrument
Unsecured revolving credit facilities					$ 1,500,000,000
Number of revolving credit facility \| credit_facility						2
Revolving Credit Facility \| Maturing in March 2024 \| Line of Credit \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)					0.90%
Revolving Credit Facility \| Maturing in February 2022 \| Line of Credit
Debt Instrument
Unsecured revolving credit facilities						$ 1,250,000,000
Facility fee, percentage					0.20%
Revolving Credit Facility \| Maturing in February 2022 \| Line of Credit \| LIBOR
Debt Instrument
Spread Over LIBOR (in percentage)						1.00%