Investments in Unconsolidated Joint Ventures - Information about Joint Ventures (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) ft² unit	Sep. 30, 2023 USD ($) ft² unit	Dec. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021
General information on each joint venture
Company's investments in unconsolidated joint ventures | $		$ 3,152,752	$ 3,152,752		$ 3,190,137
Net equity investment in VIEs in which the entity is not primary beneficiary | $		$ 453,700	$ 453,700		86,200
Unaudited Approximate Square Feet (sqft)		29,708,910	29,708,910
Ownership percentage deconsolidated	50.10%
Investment fair value adjustment | $	$ 17,000	$ 17,000	$ 17,000
Total fixed rate debt | $		1,398,724	1,398,724		3,115,814
245 Park Avenue
General information on each joint venture
Total fixed rate debt | $		$ 0	$ 0		1,712,750
National Pension Service of Korea / Hines Interest LP / International Investor | One Madison Avenue
General information on each joint venture
Ownership percentage deconsolidated				50.50%
Investment fair value adjustment | $				$ 187,500
Investment in joint venture aggregate maximum ownership percentage						25.00%
Third-Party | Korean Institutional Investor / Israeli Institutional Investor | 450 Park Avenue
General information on each joint venture
Ownership Interest		49.90%	49.90%
Investment in joint venture, partners' ownership percentage		25.00%	25.00%
Three Retail and Two Residential Units | Private Investors | 21 East 66th Street
General information on each joint venture
Ownership Interest		32.28%	32.28%
Number of stores | unit		3	3
Number of residential units | unit		1	1
Three Residential Units | Private Investors | 21 East 66th Street
General information on each joint venture
Ownership Interest		16.14%	16.14%
Number of residential units | unit		2	2
Joint venture
General information on each joint venture
Company's investments in unconsolidated joint ventures | $		$ 3,152,752	$ 3,152,752
Equity method investments with negative book value | $		129,100	129,100
Total fixed rate debt | $		$ 11,911,148	$ 11,911,148		10,855,657
Joint venture | Prudential Real Estate Investors | 100 Park Avenue
General information on each joint venture
Ownership Interest		49.90%	49.90%
Economic Interest		49.90%	49.90%
Unaudited Approximate Square Feet (sqft)		834,000	834,000
Joint venture | Wharton Properties / Private Investor | 717 Fifth Avenue
General information on each joint venture
Ownership Interest		10.92%	10.92%
Economic Interest		10.92%	10.92%
Unaudited Approximate Square Feet (sqft)		119,500	119,500
Interest rate, fixed rate debt (as a percent)		5.02%	5.02%
Total fixed rate debt | $		$ 655,328	$ 655,328		655,328
Joint venture | Private Investors | 800 Third Avenue
General information on each joint venture
Ownership Interest		60.52%	60.52%
Economic Interest		60.52%	60.52%
Unaudited Approximate Square Feet (sqft)		526,000	526,000
Interest rate, fixed rate debt (as a percent)		3.37%	3.37%
Total fixed rate debt | $		$ 177,000	$ 177,000		177,000
Joint venture | Private Investors | 21 East 66th Street
General information on each joint venture
Ownership Interest		32.28%	32.28%
Economic Interest		32.28%	32.28%
Unaudited Approximate Square Feet (sqft)		13,069	13,069
Joint venture | Private Investors | 115 Spring Street
General information on each joint venture
Ownership Interest		51.00%	51.00%
Economic Interest		51.00%	51.00%
Unaudited Approximate Square Feet (sqft)		5,218	5,218
Interest rate, fixed rate debt (as a percent)		5.50%	5.50%
Total fixed rate debt | $		$ 65,550	$ 65,550		0
Joint venture | New York State Teacher's Retirement System | 919 Third Avenue
General information on each joint venture
Ownership Interest		51.00%	51.00%
Economic Interest		51.00%	51.00%
Unaudited Approximate Square Feet (sqft)		1,454,000	1,454,000
Interest rate, fixed rate debt (as a percent)		6.11%	6.11%
Joint venture | Private Investor / Wharton Properties | 11 West 34th Street
General information on each joint venture
Ownership Interest		30.00%	30.00%
Economic Interest		30.00%	30.00%
Unaudited Approximate Square Feet (sqft)		17,150	17,150
Joint venture | Vornado Realty Trust | 280 Park Avenue
General information on each joint venture
Ownership Interest		50.00%	50.00%
Economic Interest		50.00%	50.00%
Unaudited Approximate Square Feet (sqft)		1,219,158	1,219,158
Total fixed rate debt | $					1,200,000
Joint venture | Wharton Properties | 1552-1560 Broadway
General information on each joint venture
Ownership Interest		50.00%	50.00%
Economic Interest		50.00%	50.00%
Unaudited Approximate Square Feet (sqft)		57,718	57,718
Joint venture | Wharton Properties | 650 Fifth Avenue
General information on each joint venture
Ownership Interest		50.00%	50.00%
Economic Interest		50.00%	50.00%
Unaudited Approximate Square Feet (sqft)		69,214	69,214
Interest rate, fixed rate debt (as a percent)		5.45%	5.45%
Total fixed rate debt | $		$ 65,000	$ 65,000		65,000
Joint venture | Canadian Pension Plan Investment Board | 10 East 53rd Street
General information on each joint venture
Ownership Interest		55.00%	55.00%
Economic Interest		55.00%	55.00%
Unaudited Approximate Square Feet (sqft)		354,300	354,300
Interest rate, fixed rate debt (as a percent)		5.45%	5.45%
Total fixed rate debt | $		$ 220,000	$ 220,000		220,000
Joint venture | PGIM Real Estate | 11 Madison Avenue
General information on each joint venture
Ownership Interest		60.00%	60.00%
Economic Interest		60.00%	60.00%
Unaudited Approximate Square Feet (sqft)		2,314,000	2,314,000
Interest rate, fixed rate debt (as a percent)		3.84%	3.84%
Total fixed rate debt | $		$ 1,400,000	$ 1,400,000		1,400,000
Joint venture | National Pension Service of Korea / Hines Interest LP | One Vanderbilt Avenue
General information on each joint venture
Ownership Interest		71.01%	71.01%
Economic Interest		71.01%	71.01%
Unaudited Approximate Square Feet (sqft)		1,657,198	1,657,198
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
Joint venture | RXR Realty / New York REIT | Worldwide Plaza
General information on each joint venture
Ownership Interest		24.95%	24.95%
Economic Interest		24.95%	24.95%
Unaudited Approximate Square Feet (sqft)		2,048,725	2,048,725
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
Joint venture | Allianz Real Estate of America | 1515 Broadway
General information on each joint venture
Ownership Interest		56.87%	56.87%
Economic Interest		56.87%	56.87%
Unaudited Approximate Square Feet (sqft)		1,750,000	1,750,000
Interest rate, fixed rate debt (as a percent)		3.93%	3.93%
Total fixed rate debt | $		$ 767,179	$ 767,179		782,321
Joint venture | Israeli Institutional Investor | 2 Herald Square
General information on each joint venture
Ownership Interest		51.00%	51.00%
Economic Interest		51.00%	51.00%
Unaudited Approximate Square Feet (sqft)		369,000	369,000
Joint venture | A Fund Managed By Meritz Alternative Investment Management | 15 Beekman
General information on each joint venture
Ownership Interest		20.00%	20.00%
Economic Interest		20.00%	20.00%
Unaudited Approximate Square Feet (sqft)		221,884	221,884
Joint venture | A Fund Managed By Meritz Alternative Investment Management | 220 East 42nd Street
General information on each joint venture
Ownership Interest		51.00%	51.00%
Economic Interest		51.00%	51.00%
Unaudited Approximate Square Feet (sqft)		1,135,000	1,135,000
Interest rate, fixed rate debt (as a percent)		5.86%	5.86%
Total fixed rate debt | $		$ 505,412	$ 505,412		510,000
Joint venture | Wells Fargo | 85 Fifth Avenue
General information on each joint venture
Ownership Interest		36.27%	36.27%
Economic Interest		36.27%	36.27%
Unaudited Approximate Square Feet (sqft)		12,946	12,946
Joint venture | National Pension Service of Korea / Hines Interest LP / International Investor | One Madison Avenue
General information on each joint venture
Ownership Interest		25.50%	25.50%
Economic Interest		25.50%	25.50%
Unaudited Approximate Square Feet (sqft)		1,048,700	1,048,700
Interest rate, fixed rate debt (as a percent)		3.59%	3.59%
Total fixed rate debt | $		$ 662,663	$ 662,663		467,008
Joint venture | Korean Institutional Investor / Israeli Institutional Investor | 450 Park Avenue
General information on each joint venture
Ownership Interest		50.10%	50.10%
Economic Interest		25.10%	25.10%
Unaudited Approximate Square Feet (sqft)		337,000	337,000
Investment in joint venture, ownership percentage		25.10%	25.10%
Interest rate, fixed rate debt (as a percent)		6.10%	6.10%
Total fixed rate debt | $		$ 267,000	$ 267,000		267,000
Joint venture | RXR Realty Led Investment Group | 5 Times Square
General information on each joint venture
Ownership Interest		31.55%	31.55%
Economic Interest		31.55%	31.55%
Unaudited Approximate Square Feet (sqft)		1,131,735	1,131,735
Interest rate, fixed rate debt (as a percent)		7.07%	7.07%
Total fixed rate debt | $		$ 434,816	$ 434,816		400,000
Joint venture | Mori Trust Co., Ltd | 245 Park Avenue
General information on each joint venture
Ownership Interest		50.10%	50.10%
Economic Interest		50.10%	50.10%
Unaudited Approximate Square Feet (sqft)		1,782,793	1,782,793
Interest rate, fixed rate debt (as a percent)		4.30%	4.30%
Total fixed rate debt | $		$ 1,768,000	$ 1,768,000		$ 0
Joint venture | A Fund Affiliated With Winthrop Capital Partners | 625 Madison Avenue
General information on each joint venture
Ownership Interest		90.43%	90.43%
Economic Interest		90.43%	90.43%
Unaudited Approximate Square Feet (sqft)		563,000	563,000