Investments in Unconsolidated Joint Ventures - Schedule of General Information on Joint Ventures (Details)	1 Months Ended	3 Months Ended			9 Months Ended
	Jan. 31, 2024 USD ($)	Sep. 30, 2024 USD ($) ft²	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) ft²	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2021
General information on each joint venture
Depreciable real estate reserves and impairment | $		$ 0		$ 389,000	$ (65,839,000)	$ (305,527,000)
Mortgages and other loans payable, net | $		1,643,992,000			1,643,992,000		$ 1,491,319,000
625 Madison Avenue
General information on each joint venture
Depreciable real estate reserves and impairment | $			$ 5,900,000
625 Madison Avenue | Preferred Equity (4)
General information on each joint venture
Carrying value of investment in leasehold interest | $		235,400,000			$ 235,400,000
Average yield (as a percent)					8.91%
Joint venture
General information on each joint venture
Mortgages and other loans payable, net | $		$ 13,653,311,000			$ 13,653,311,000		$ 14,799,277,000
Joint venture | 2 Herald Square
General information on each joint venture
Consideration transferred | $	$ 0
Investment in joint venture, ownership percentage	95.00%
Prudential Real Estate Investors | Joint venture | 100 Park Avenue
General information on each joint venture
Ownership Interest		49.90%			49.90%
Economic Interest (as a percent)		49.90%			49.90%
Approximate Square Feet unaudited (sqft)		834,000			834,000
Private Investors | Joint venture | 800 Third Avenue
General information on each joint venture
Ownership Interest		60.52%			60.52%
Economic Interest (as a percent)		60.52%			60.52%
Interest rate, fixed rate debt (as a percent)		3.37%			3.37%
Approximate Square Feet unaudited (sqft)		526,000			526,000
Private Investors | Joint venture | 115 Spring Street
General information on each joint venture
Ownership Interest		51.00%			51.00%
Economic Interest (as a percent)		51.00%			51.00%
Interest rate, fixed rate debt (as a percent)		5.50%			5.50%
Approximate Square Feet unaudited (sqft)		5,218			5,218
Private Investors | Joint venture | 625 Madison Avenue
General information on each joint venture
Ownership Interest		90.93%			90.93%
Economic Interest (as a percent)		90.93%			90.93%
Approximate Square Feet unaudited (sqft)		591,123			591,123
New York State Teacher's Retirement System | Joint venture | 919 Third Avenue
General information on each joint venture
Ownership Interest		51.00%			51.00%
Economic Interest (as a percent)		51.00%			51.00%
Interest rate, fixed rate debt (as a percent)		6.11%			6.11%
Approximate Square Feet unaudited (sqft)		1,454,000			1,454,000
Private Investor / Wharton Properties | Joint venture | 11 West 34th Street
General information on each joint venture
Ownership Interest		30.00%			30.00%
Economic Interest (as a percent)		30.00%			30.00%
Approximate Square Feet unaudited (sqft)		17,150			17,150
Vornado Realty Trust | Joint venture | 280 Park Avenue
General information on each joint venture
Ownership Interest		50.00%			50.00%
Economic Interest (as a percent)		50.00%			50.00%
Interest rate, fixed rate debt (as a percent)		5.84%			5.84%
Approximate Square Feet unaudited (sqft)		1,219,158			1,219,158
Wharton Properties | Joint venture | 1552-1560 Broadway
General information on each joint venture
Ownership Interest		50.00%			50.00%
Approximate Square Feet unaudited (sqft)		57,718			57,718
Wharton Properties | Joint venture | 650 Fifth Avenue
General information on each joint venture
Ownership Interest		50.00%			50.00%
Economic Interest (as a percent)		50.00%			50.00%
Interest rate, fixed rate debt (as a percent)		5.45%			5.45%
Approximate Square Feet unaudited (sqft)		69,214			69,214
PGIM Real Estate | Joint venture | 11 Madison Avenue
General information on each joint venture
Ownership Interest		60.00%			60.00%
Economic Interest (as a percent)		60.00%			60.00%
Interest rate, fixed rate debt (as a percent)		3.84%			3.84%
Approximate Square Feet unaudited (sqft)		2,314,000			2,314,000
National Pension Service of Korea / Hines Interest LP | Joint venture | One Vanderbilt Avenue
General information on each joint venture
Ownership Interest		71.01%			71.01%
Economic Interest (as a percent)		71.01%			71.01%
Interest rate, fixed rate debt (as a percent)		2.95%			2.95%
Approximate Square Feet unaudited (sqft)		1,657,198			1,657,198
National Pension Service of Korea / Hines Interest LP | Joint venture | East 220 Street 42
General information on each joint venture
Interest rate, fixed rate debt (as a percent)		6.77%			6.77%
National Pension Service of Korea / Hines Interest LP | Joint venture | 5 Times Square
General information on each joint venture
Interest rate, fixed rate debt (as a percent)
RXR Realty / New York REIT | Joint venture | Worldwide Plaza
General information on each joint venture
Ownership Interest		24.95%			24.95%
Economic Interest (as a percent)		24.95%			24.95%
Interest rate, fixed rate debt (as a percent)		3.98%			3.98%
Approximate Square Feet unaudited (sqft)		2,048,725			2,048,725
Allianz Real Estate of America | Joint venture | 1515 Broadway
General information on each joint venture
Ownership Interest		56.87%			56.87%
Economic Interest (as a percent)		56.87%			56.87%
Interest rate, fixed rate debt (as a percent)		3.93%			3.93%
Approximate Square Feet unaudited (sqft)		1,750,000			1,750,000
Israeli Institutional Investor | Joint venture | 2 Herald Square
General information on each joint venture
Ownership Interest		95.00%			95.00%
Economic Interest (as a percent)		95.00%			95.00%
Approximate Square Feet unaudited (sqft)		369,000			369,000
A fund managed by Meritz Alternative Investment Management | Joint venture | 15 Beekman
General information on each joint venture
Ownership Interest		20.00%			20.00%
Economic Interest (as a percent)		20.00%			20.00%
Interest rate, fixed rate debt (as a percent)		5.99%			5.99%
Approximate Square Feet unaudited (sqft)		221,884			221,884
A fund managed by Meritz Alternative Investment Management | Joint venture | East 220 Street 42
General information on each joint venture
Ownership Interest		51.00%			51.00%
Economic Interest (as a percent)		51.00%			51.00%
Approximate Square Feet unaudited (sqft)		1,135,000			1,135,000
Wells Fargo | Joint venture | 85 Fifth Avenue
General information on each joint venture
Ownership Interest		36.27%			36.27%
Economic Interest (as a percent)		36.27%			36.27%
Approximate Square Feet unaudited (sqft)		12,946			12,946
National Pension Service of Korea / Hines Interest LP / International Investor | One Madison Avenue
General information on each joint venture
Investment in joint venture aggregate maximum ownership percentage								25.00%
National Pension Service of Korea / Hines Interest LP / International Investor | Joint venture | One Madison Avenue
General information on each joint venture
Ownership Interest		25.50%			25.50%
Economic Interest (as a percent)		25.50%			25.50%
Interest rate, fixed rate debt (as a percent)		7.10%			7.10%
Approximate Square Feet unaudited (sqft)		1,048,700			1,048,700
Korean Institutional Investor / Israeli Institutional Investor | 450 Park Avenue | Third-Party
General information on each joint venture
Ownership Interest		49.90%			49.90%
Investment in joint venture, partners' ownership percentage		25.00%			25.00%
Korean Institutional Investor / Israeli Institutional Investor | Joint venture | 450 Park Avenue
General information on each joint venture
Ownership Interest		50.10%			50.10%
Economic Interest (as a percent)		25.10%			25.10%
Interest rate, fixed rate debt (as a percent)		6.10%			6.10%
Approximate Square Feet unaudited (sqft)		337,000			337,000
Investment in joint venture, ownership percentage		25.10%			25.10%
RXR Realty led investment group | Joint venture | 5 Times Square
General information on each joint venture
Ownership Interest		31.55%			31.55%
Economic Interest (as a percent)		31.55%			31.55%
Approximate Square Feet unaudited (sqft)		1,131,735			1,131,735
U.S. Affiliate of Mori Trust Co., Ltd | Joint venture | 245 Park Avenue
General information on each joint venture
Ownership Interest		50.10%			50.10%
Economic Interest (as a percent)		50.10%			50.10%
Interest rate, fixed rate debt (as a percent)		4.30%			4.30%
Approximate Square Feet unaudited (sqft)		1,782,793			1,782,793