Investments in Unconsolidated Joint Ventures - Schedule of Mortgage Notes and Other Loans Payable Collateralized by the Respective Joint Venture Properties and Assignment of Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Instrument [Line Items]
Total fixed rate debt	$ 1,903,866		$ 1,903,866		$ 1,587,474
Total floating rate debt	384,516		384,516		363,550
Gain on early extinguishment of debt	0	$ 0	0	$ 17,777
Due from joint venture
Debt Instrument [Line Items]
Total fixed rate debt	11,566,223		11,566,223		11,551,101
Total floating rate debt	681,808		681,808		780,889
Total fixed rate and floating rate debt	12,248,031		12,248,031		12,331,990
Deferred financing costs, net	(102,961)		(102,961)		(97,729)
Total joint venture mortgages and other loans payable, net	12,145,070		12,145,070		12,234,261
Gain on early extinguishment of debt	129,068	$ 0	129,068	$ 233,704
Due from joint venture | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	5,578,828		5,578,828		5,728,933
Total floating rate debt	226,346		226,346		298,929
Total fixed rate and floating rate debt	5,805,174		5,805,174		6,027,862
Deferred financing costs, net	(51,791)		(51,791)		(49,058)
Total joint venture mortgages and other loans payable, net	5,753,383		5,753,383		5,978,804
Due from joint venture | One Madison Avenue | Construction Loans
Debt Instrument [Line Items]
Maximum facility capacity	$ 1,250,000		$ 1,250,000
Wharton Properties | Due from joint venture | 650 Fifth Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	50.00%		50.00%
Interest rate, fixed rate debt (as a percent)	5.45%		5.45%
Interest rate, floating rate debt (as a percent)	2.25%		2.25%
Total fixed rate debt	$ 65,000		$ 65,000		65,000
Total floating rate debt	210,000		210,000		210,000
Wharton Properties | Due from joint venture | 650 Fifth Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	32,500		32,500		32,500
Total floating rate debt	$ 105,000		$ 105,000		105,000
Wharton Properties | Due from joint venture | 1552 Broadway
Debt Instrument [Line Items]
Interest rate, floating rate debt (as a percent)
Total floating rate debt	$ 0		$ 0		193,132
Wharton Properties | Due from joint venture | 1552 Broadway | Common Stock
Debt Instrument [Line Items]
Total floating rate debt	$ 0		$ 0		96,566
Private Investors | Due from joint venture | 115 Spring Street
Debt Instrument [Line Items]
Economic interest (as a percent)	51.00%		51.00%
Interest rate, fixed rate debt (as a percent)	5.50%		5.50%
Total fixed rate debt	$ 65,550		$ 65,550		65,550
Private Investors | Due from joint venture | 115 Spring Street | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 33,431		$ 33,431		33,431
Private Investors | Due from joint venture | 800 Third Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	60.52%		60.52%
Interest rate, fixed rate debt (as a percent)	3.37%		3.37%
Total fixed rate debt	$ 177,000		$ 177,000		177,000
Private Investors | Due from joint venture | 800 Third Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 107,120		$ 107,120		107,120
PGIM Real Estate | Due from joint venture | 11 Madison Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	60.00%		60.00%
Interest rate, fixed rate debt (as a percent)	5.62%		5.62%
Total fixed rate debt	$ 1,400,000		$ 1,400,000		1,400,000
PGIM Real Estate | Due from joint venture | 11 Madison Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 840,000		$ 840,000		840,000
A fund managed by Meritz Alternative Investment Management | Due from joint venture | 15 Beekman
Debt Instrument [Line Items]
Economic interest (as a percent)	20.00%		20.00%
Interest rate, fixed rate debt (as a percent)	5.99%		5.99%
Total fixed rate debt	$ 120,000		$ 120,000		120,000
A fund managed by Meritz Alternative Investment Management | Due from joint venture | 15 Beekman | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 24,000		$ 24,000		24,000
A fund managed by Meritz Alternative Investment Management | Due from joint venture | 220 East 42nd Street
Debt Instrument [Line Items]
Economic interest (as a percent)	51.00%		51.00%
Interest rate, fixed rate debt (as a percent)	6.77%		6.77%
Total fixed rate debt	$ 496,412		$ 496,412		496,412
A fund managed by Meritz Alternative Investment Management | Due from joint venture | 220 East 42nd Street | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 253,170		$ 253,170		253,170
Allianz Real Estate of America | Due from joint venture | 1515 Broadway
Debt Instrument [Line Items]
Economic interest (as a percent)	56.87%		56.87%
Interest rate, fixed rate debt (as a percent)	3.93%		3.93%
Total fixed rate debt	$ 724,550		$ 724,550		740,947
Allianz Real Estate of America | Due from joint venture | 1515 Broadway | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 412,044		$ 412,044		421,369
New York State Teacher's Retirement System | Due from joint venture | 919 Third Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	51.00%		51.00%
Interest rate, fixed rate debt (as a percent)	6.11%		6.11%
Total fixed rate debt	$ 500,000		$ 500,000		500,000
New York State Teacher's Retirement System | Due from joint venture | 919 Third Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 255,000		$ 255,000		255,000
Korean Institutional Investor / Israeli Institutional Investor | Due from joint venture | 450 Park Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	25.10%		25.10%
Interest rate, fixed rate debt (as a percent)	6.10%		6.10%
Total fixed rate debt	$ 289,256		$ 289,256		284,835
Korean Institutional Investor / Israeli Institutional Investor | Due from joint venture | 450 Park Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 72,604		$ 72,604		71,494
Vornado Realty Trust | Due from joint venture | 280 Park Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	50.00%		50.00%
Interest rate, fixed rate debt (as a percent)	5.84%		5.84%
Total fixed rate debt	$ 1,075,000		$ 1,075,000		1,075,000
Vornado Realty Trust | Due from joint venture | 280 Park Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 537,500		$ 537,500		537,500
U.S. Affiliate of Mori Trust Co., Ltd | Due from joint venture | 245 Park Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	50.10%		50.10%
Interest rate, fixed rate debt (as a percent)	4.30%		4.30%
Total fixed rate debt	$ 1,768,000		$ 1,768,000		1,768,000
U.S. Affiliate of Mori Trust Co., Ltd | Due from joint venture | 245 Park Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 885,768		$ 885,768		885,768
National Pension Service of Korea / Hines Interest LP / International Investor | Due from joint venture | One Madison Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	25.50%		25.50%
Interest rate, fixed rate debt (as a percent)	7.10%		7.10%
Interest rate, floating rate debt (as a percent)	3.10%		3.10%
Total fixed rate debt	$ 685,455		$ 685,455		658,357
Total floating rate debt	448,808		448,808		354,757
National Pension Service of Korea / Hines Interest LP / International Investor | Due from joint venture | One Madison Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	174,791		174,791		167,881
Total floating rate debt	$ 114,446		$ 114,446		90,463
RXR Realty / New York REIT | Due from joint venture | Worldwide Plaza
Debt Instrument [Line Items]
Economic interest (as a percent)	25.05%		25.05%
Interest rate, fixed rate debt (as a percent)	3.98%		3.98%
Total fixed rate debt	$ 1,200,000		$ 1,200,000		1,200,000
RXR Realty / New York REIT | Due from joint venture | Worldwide Plaza | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 300,600		$ 300,600		299,400
National Pension Service of Korea / Hines Interest LP | Due from joint venture | One Vanderbilt Avenue
Debt Instrument [Line Items]
Economic interest (as a percent)	55.01%		55.01%
Interest rate, fixed rate debt (as a percent)	2.95%		2.95%
Total fixed rate debt	$ 3,000,000		$ 3,000,000		3,000,000
National Pension Service of Korea / Hines Interest LP | Due from joint venture | One Vanderbilt Avenue | Common Stock
Debt Instrument [Line Items]
Total fixed rate debt	$ 1,650,300		$ 1,650,300		1,800,300
Wharton Properties / Private Investor | Due from joint venture | 11 West 34th Street
Debt Instrument [Line Items]
Economic interest (as a percent)	30.00%		30.00%
Interest rate, floating rate debt (as a percent)	1.45%		1.45%
Total floating rate debt	$ 23,000		$ 23,000		23,000
Wharton Properties / Private Investor | Due from joint venture | 11 West 34th Street | Common Stock
Debt Instrument [Line Items]
Total floating rate debt	$ 6,900		$ 6,900		$ 6,900