Investments in Unconsolidated Joint Ventures - Schedule of General Information on Joint Ventures (Details) $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2025 USD ($) ft²	Jul. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) ft²	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2025	Dec. 31, 2022 USD ($)	Dec. 31, 2021
General information on each joint venture
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate | $				$ 86,068	$ 208,144	$ (13,368)
Carrying value of investment in leasehold interest | $	$ 7,159,632			7,159,632	6,607,741	6,102,864		$ 9,198,799
Cash consideration | $				182,737	451,233	$ 184,481
Debt and preferred equity investments | $	168,358			168,358	$ 303,726
625 Madison Avenue | Preferred Equity
General information on each joint venture
Joint venture sold (as a percent)		0.500
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate | $			$ (14,500)
Carrying value of investment in leasehold interest | $	235,400	$ 104,900		235,400
Cash consideration | $		23,700
Proceeds from divestiture of interest in joint venture | $		$ 10,900
Debt and preferred equity investments | $	$ 122,400			$ 122,400
Average yield (as a percent)				13.72%
Due from joint ventures | 100 Park Avenue
General information on each joint venture
Economic Interest (as a percent)	50.80%			50.80%
Approximate Square Feet	834,000			834,000
New York State Teacher's Retirement System | Due from joint ventures | 919 Third Avenue
General information on each joint venture
Economic Interest (as a percent)	51.00%			51.00%
Approximate Square Feet	1,454,000			1,454,000
Private Investor / Wharton Properties | Due from joint ventures | 11 West 34th Street
General information on each joint venture
Economic Interest (as a percent)	30.00%			30.00%
Approximate Square Feet	17,150			17,150
Vornado Realty Trust | Due from joint ventures | 280 Park Avenue
General information on each joint venture
Economic Interest (as a percent)	50.00%			50.00%
Approximate Square Feet	1,219,158			1,219,158
Wharton Properties | Due from joint ventures | 1552-1560 Broadway
General information on each joint venture
Approximate Square Feet	57,718			57,718
Wharton Properties | Due from joint ventures | 650 Fifth Avenue
General information on each joint venture
Economic Interest (as a percent)	50.00%			50.00%
Approximate Square Feet	69,214			69,214
PGIM Real Estate | Due from joint ventures | 11 Madison Avenue
General information on each joint venture
Economic Interest (as a percent)	60.00%			60.00%
Approximate Square Feet	2,314,000			2,314,000
National Pension Service of Korea / Hines Interest LP / Mori Building Co., Ltd | Due from joint ventures | One Vanderbilt Avenue
General information on each joint venture
Economic Interest (as a percent)							55.01%
Approximate Square Feet	1,657,198			1,657,198
Joint venture sold (as a percent)							0.05
RXR Realty / New York REIT | Worldwide Plaza
General information on each joint venture
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate | $	$ (4,400)
RXR Realty / New York REIT | Due from joint ventures | Worldwide Plaza
General information on each joint venture
Economic Interest (as a percent)	25.05%			25.05%
Approximate Square Feet	2,048,725			2,048,725
Allianz Real Estate of America | Due from joint ventures | 1515 Broadway
General information on each joint venture
Economic Interest (as a percent)	56.87%			56.87%
Approximate Square Feet	1,750,000			1,750,000
Israeli Institutional Investor | 2 Herald Square
General information on each joint venture
Equity in net gain (loss) on sale of interest in unconsolidated joint venture/real estate | $	$ (8,400)
Israeli Institutional Investor | Due from joint ventures | 2 Herald Square
General information on each joint venture
Economic Interest (as a percent)	95.00%			95.00%
Approximate Square Feet	369,000			369,000
Private Investor | Due from joint ventures | 115 Spring Street
General information on each joint venture
Economic Interest (as a percent)	51.00%			51.00%
Approximate Square Feet	5,218			5,218
Private Investor | Due from joint ventures | 625 Madison Avenue
General information on each joint venture
Economic Interest (as a percent)	50.00%			50.00%
Approximate Square Feet	563,000			563,000
Private Investor | Due from joint ventures | 800 Third Avenue
General information on each joint venture
Economic Interest (as a percent)
A fund managed by Meritz Alternative Investment Management | Due from joint ventures | 15 Beekman
General information on each joint venture
Economic Interest (as a percent)	20.00%			20.00%
Approximate Square Feet	221,884			221,884
A fund managed by Meritz Alternative Investment Management | Due from joint ventures | 220 East 42nd Street
General information on each joint venture
Economic Interest (as a percent)	51.00%			51.00%
Approximate Square Feet	1,135,000			1,135,000
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%			25.00%					25.00%
National Pension Service of Korea / Hines Interest LP / International Investor | Due from joint ventures | One Madison Avenue
General information on each joint venture
Economic Interest (as a percent)	25.50%			25.50%
Approximate Square Feet	1,048,700			1,048,700
Korean Institutional Investor / Israeli Institutional Investor | 450 Park Avenue | Third-Party
General information on each joint venture
Investment in joint venture, partners' ownership percentage	25.00%			25.00%
Ownership interest (as a percent)	49.90%			49.90%
Korean Institutional Investor / Israeli Institutional Investor | Due from joint ventures | 1552-1560 Broadway
General information on each joint venture
Economic Interest (as a percent)	50.00%			50.00%
Korean Institutional Investor / Israeli Institutional Investor | Due from joint ventures | 450 Park Avenue
General information on each joint venture
Economic Interest (as a percent)	25.10%			25.10%
Approximate Square Feet	337,000			337,000
Investment in joint venture, ownership percentage	25.10%			25.10%
Ownership interest (as a percent)	50.10%			50.10%
Korean Institutional Investor / Israeli Institutional Investor | Due from joint ventures | 450 Park Avenue
General information on each joint venture
Economic Interest (as a percent)	25.10%			25.10%
U.S. Affiliate of Mori Trust Co., Ltd | Due from joint ventures | 245 Park Avenue
General information on each joint venture
Economic Interest (as a percent)	50.10%			50.10%
Approximate Square Feet	1,782,793			1,782,793