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

Face (par) amount of debt instrument at time of issuance.

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- Definition

Amount of principal of debt repaid.

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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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- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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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.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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- Definition

Debt Instrument Swapped Rate

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No definition available.

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- Definition

Lease Commission, Percentage

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No definition available.

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- Definition

Lease Commissions Override

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No definition available.

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- Definition

Percentage of rent payable to related party for leasing services for the eleventh through twentieth years of the lease.

+ References

No definition available.

+ Details

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- Definition

Percentage of rent payable to related party for leasing services for the first ten years of the lease.

+ References

No definition available.

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- Definition

Percentage of rent payable to related party for leasing services for the twenty-first through thirtieth years of the lease.

+ References

No definition available.

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- Definition

Number Of Credit Facilities

+ References

No definition available.

+ Details

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- Definition

Number of Units Sold

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Percentage of increase in leasing services payable to related party if a real estate broker is used

+ References

No definition available.

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Subsequent Events (Details) ft² in Thousands							1 Months Ended
Subsequent Events (Details) ft² in Thousands	May 03, 2024 USD ($) ft² credit_facility	May 01, 2024	Apr. 12, 2024 USD ($) property	Apr. 09, 2024 USD ($)	Apr. 08, 2024 USD ($)	Apr. 04, 2024 USD ($)	May 08, 2024 USD ($)	May 02, 2024 USD ($)	Mar. 31, 2024
Alexander's
Subsequent Events
Equity method ownership percentage									32.40%
Equity Method Investee \| Alexander's
Subsequent Events
Equity method ownership percentage									32.40%
Subsequent Event \| Alexander’s and Bloomberg L.P.
Subsequent Events
Term	11 years
Subsequent Event \| Alexander’s and Bloomberg L.P. \| Office and Retail Building
Subsequent Events
Square footage of real estate property (in sqft) \| ft²	947
Lease commission override							$ 5,500,000
Subsequent Event \| Sale \| 220 Central Park South
Subsequent Events
Number of condominium units sold (unit) \| property			2
Proceeds from sale of real estate			$ 31,605,000
Subsequent Event \| 435 Seventh Avenue \| Mortgages Payable:
Subsequent Events
Loan				$ 75,000,000	$ 95,696,000
Swapped rate				6.96%
Subsequent Event \| 435 Seventh Avenue \| Mortgages Payable: \| Recourse
Subsequent Events
Loan				$ 37,500,000
Subsequent Event \| 435 Seventh Avenue \| Mortgages Payable: \| SOFR
Subsequent Events
Basis spread on variable rate				2.10%	1.41%
Subsequent Event \| Unsecured Revolving Credit Facility, Maturing April 2029 \| Revolving Credit Facility
Subsequent Events
Number of credit facilities \| credit_facility	2
Maximum borrowing capacity	$ 915,000,000							$ 1,250,000,000
Facility fee (percent)	0.25%
Subsequent Event \| Unsecured Revolving Credit Facility, Maturing April 2029 \| SOFR \| Revolving Credit Facility
Subsequent Events
Basis spread on variable rate	1.20%
Subsequent Event \| Unsecured Revolving Credit Facility, Maturing December 2027 \| Revolving Credit Facility
Subsequent Events
Maximum borrowing capacity	$ 1,250,000,000
Facility fee (percent)	0.25%
Subsequent Event \| Unsecured Revolving Credit Facility, Maturing December 2027 \| SOFR \| Revolving Credit Facility
Subsequent Events
Basis spread on variable rate	1.14%
Subsequent Event \| Joint Venture \| 280 Park Avenue
Subsequent Events
Equity method ownership percentage						50.00%
Subsequent Event \| Joint Venture \| 280 Park Avenue \| 280 Park Avenue \| Mortgages Payable:
Subsequent Events
Loan						$ 1,075,000,000
Subsequent Event \| Joint Venture \| 280 Park Avenue \| 280 Park Avenue \| Mortgages Payable: \| SOFR
Subsequent Events
Basis spread on variable rate						1.78%
Subsequent Event \| Joint Venture \| 280 Park Avenue \| Mezzanine Loan \| Mortgages Payable:
Subsequent Events
Loan						$ 125,000,000
Repaid on loan						$ 62,500,000
Subsequent Event \| Affiliated Entity \| Leasing Fees
Subsequent Events
Lease fee percentage of rent one to ten years	3.00%
Lease fee percentage of rent eleven to twenty years	2.00%
Lease fee percentage of rent twenty first to thirty years	1.00%
Percentage increase lease fee if broker used	1.00%
Percentage of third-party lease commission		33.00%
Subsequent Event \| Equity Method Investee \| Alexander's
Subsequent Events
Equity method ownership percentage	32.40%