Dispositions (Details) ft² in Thousands, $ in Thousands					12 Months Ended
	Dec. 21, 2022 USD ($) ft²	Dec. 15, 2022 USD ($) ft²	Jun. 17, 2022 USD ($) ft² story	Jan. 13, 2022 USD ($) property	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Acquisitions and Dispositions [Line Items]
Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South					$ 88,019	$ 137,404	$ 1,044,260
Repayments of long-term debt					$ 1,251,373	$ 1,584,243	$ 1,067,564
SoHo Properties
Acquisitions and Dispositions [Line Items]
Number of properties sold | property				2
Proceeds from sale of land held-for-investment				$ 84,500
Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South				81,399
Net gain on sale of land				$ 551
Center Building
Acquisitions and Dispositions [Line Items]
Proceeds from sale of land held-for-investment			$ 172,750
Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South			58,946
Net gain on sale of land			$ 15,213
Number of floors | story			8
Square footage of real estate property (in sqft) | ft²			498
Center Building | 33‑00 Northern Boulevard Mortgage Loan
Acquisitions and Dispositions [Line Items]
Repayments of long-term debt			$ 100,000
484-486 Broadway
Acquisitions and Dispositions [Line Items]
Proceeds from sale of land held-for-investment		$ 23,520
Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South		22,430
Net gain on sale of land		$ 2,919
Square footage of real estate property (in sqft) | ft²		30
40 Fulton Street Office And Retail Building
Acquisitions and Dispositions [Line Items]
Proceeds from sale of land held-for-investment	$ 101,000
Proceeds from sale of condominium units and ancillary amenities at 220 Central Park South	96,566
Net gain on sale of land	$ 31,876
Square footage of real estate property (in sqft) | ft²	251