Revenue Recognition - Additional Information (Details) ft² in Thousands			1 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended
	Jan. 31, 2025 USD ($) ft²	Dec. 03, 2022 USD ($) ft²	May 31, 2024 USD ($) ft²	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)
Disaggregation of Revenue [Line Items]
Rental revenues				$ 53,424,000	$ 55,675,000		$ 159,928,000	$ 170,464,000
Lease revenues				$ 50,944,000	$ 53,244,000		153,172,000	163,878,000
731 Lexington Avenue Property | Home Depot | Tenant Occupant
Disaggregation of Revenue [Line Items]
Area of property (in sqft.) | ft²	83
Lease revenues	$ 15,000,000
Bloomberg | 731 Lexington Avenue Property
Disaggregation of Revenue [Line Items]
Area of property (in sqft.) | ft²			947
Term			11 years
Payments for lease commissions			$ 32,000,000
Bloomberg | 731 Lexington Avenue Property | Third Party Broker
Disaggregation of Revenue [Line Items]
Payments for lease commissions			26,500,000
Bloomberg | 731 Lexington Avenue Property | Vornado
Disaggregation of Revenue [Line Items]
Payments for lease commissions			$ 5,500,000
IKEA | Rego Park 1 Property
Disaggregation of Revenue [Line Items]
Area of property (in sqft.) | ft²		112
Payment for termination of lease		$ 10,000,000				$ 10,000,000
Customer Concentration Risk | Revenue | Bloomberg
Disaggregation of Revenue [Line Items]
Rental revenues							$ 96,655,000	$ 93,179,000
Percentage rent contributed by tenant							60.00%	55.00%