Commitments and Contingencies (Details) ft² in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2022 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2020 USD ($)	Jul. 31, 2018 USD ($) ft²
Other Commitments
Guarantees and master leases			$ 1,026,000,000
Guarantees			510,000,000
Fund clawback payment			26,200,000
Commitment to fund additional capital to partially owned entities			10,300,000
Construction commitment			$ 351,000,000
Joint Venture | Farley Office and Retail
Other Commitments
Equity method ownership percentage			95.00%
Capital contributions			$ 92,400,000	$ 92,400,000
Affiliated Entity | Farley Office and Retail
Other Commitments
Equity method ownership percentage			5.00%
Unsecured revolving credit facilities
Other Commitments
Outstanding letters of credit			$ 15,273,000
PENN 1
Other Commitments
Term of contract	25 years
Length of extension available (years)	25 years
Finance lease liability	$ 350,000,000
Finance lease, right-of-use asset	$ 350,000,000
Lessee, finance lease, term of ground leases	25 years
345 Montgomery Street | Subsidiary of Regus PLC
Other Commitments
Square footage of real estate property (in sqft) | ft²					78
Lessor, operating lease, lease not yet commenced, term of contract					15 years
Regus PLC | Forecast
Other Commitments
Loss contingency, damages awarded, value		$ 21,350,000
Regus PLC | 345 Montgomery Street
Other Commitments
Guarantor obligations, maximum exposure, undiscounted					$ 90,000,000
General Liability
Insurance
Insurance limit per occurrence			300,000,000
Insurance limit per property			300,000,000
Disease Coverage
Insurance
Insurance limit per property			250,000,000
All Risk And Rental Value
Insurance
Insurance limit per occurrence			2,000,000,000
Earthquake California Properties
Insurance
Insurance limit per occurrence			350,000,000
Insurance maximum coverage limit in aggregate			$ 350,000,000
Vornado deductible, percentage of property value			5.00%
Terrorism Acts
Insurance
Insurance limit per occurrence			$ 6,000,000,000
Insurance maximum coverage limit in aggregate			6,000,000,000
Non-Certified Acts of Terrorism
Insurance
Insurance maximum coverage limit in aggregate			1,200,000,000
NBCR Acts
Insurance
Insurance limit per occurrence			5,000,000,000
Insurance maximum coverage limit in aggregate			5,000,000,000
NBCR Acts | PPIC
Insurance
Insurance deductible			$ 1,774,525
Insurance deductible percentage of balance of covered loss			20.00%