Related Party Transactions - Excluded Properties and Businesses (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) interest property office_property	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 28, 2023 property
Related Party Transaction [Line Items]
Revenues | $	$ 739,572	$ 727,041	$ 624,094
Office Building
Related Party Transaction [Line Items]
Number of properties | office_property	11
Office Building | Manhattan
Related Party Transaction [Line Items]
Number of properties | office_property	9
Malkin group | Mezzanine and senior equity funds
Related Party Transaction [Line Items]
Number of interests owned | interest	1
Malkin group | Residential property manager
Related Party Transaction [Line Items]
Number of properties | interest	3
Number of interests owned | interest	3
Malkin group | Multi-family property | Greenwich, connecticut
Related Party Transaction [Line Items]
Number of properties	7
Malkin group | Retail Site | Greenwich, connecticut
Related Party Transaction [Line Items]
Number of properties	5
Malkin group | Retail Site | Manhattan
Related Party Transaction [Line Items]
Number of properties	2
Malkin group | Retail Site | Westport, Connecticut | Disposal Group, Disposed of by Sale, Not Discontinued Operations | 69-97 and 103-107 Main Street
Related Party Transaction [Line Items]
Number of properties				2
Malkin group | Former post office | Greenwich, connecticut
Related Party Transaction [Line Items]
Number of properties	1
Malkin group | Office Building | Manhattan
Related Party Transaction [Line Items]
Number of properties	1
Affiliated entities | Supervisory fee revenue
Related Party Transaction [Line Items]
Revenues | $	$ 900	1,000	1,000
Affiliated entities | Property management fee revenue
Related Party Transaction [Line Items]
Revenues | $	$ 300	$ 300	$ 200