Fair Value of Financial Instruments - Schedule of Financial Instruments that are Not Reported at Fair Value (Details) - Mortgages Note Payable - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2025	Mar. 31, 2026	Dec. 31, 2025
Significant Unobservable Inputs | Gross Principal Balance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		$ 251,000	$ 251,000
Significant Unobservable Inputs | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		224,463	224,289
Mortgage note payable — 123 William Street | Significant Unobservable Inputs | Gross Principal Balance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		140,000	140,000
Mortgage note payable — 123 William Street | Significant Unobservable Inputs | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		137,335	136,990
Mortgage note payable — 400 E. 67th Street - Laurel Condominium / 200 Riverside Boulevard - ICON Garage | Significant Unobservable Inputs | Gross Principal Balance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		50,000	50,000
Mortgage note payable — 400 E. 67th Street - Laurel Condominium / 200 Riverside Boulevard - ICON Garage | Significant Unobservable Inputs | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		30,314	30,314
Mortgage note payable — 8713 Fifth Avenue | Significant Unobservable Inputs | Gross Principal Balance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		10,000	10,000
Mortgage note payable — 8713 Fifth Avenue | Significant Unobservable Inputs | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		9,716	9,763
Mortgage note payable — 196 Orchard Street | Significant Unobservable Inputs | Gross Principal Balance
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		51,000	51,000
Mortgage note payable — 196 Orchard Street | Significant Unobservable Inputs | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage notes payable		$ 47,098	$ 47,222
400 E. 67th Street Laurel Condominium
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impairments of real estate investments	$ 3,100
200 Riverside Boulevard
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impairments of real estate investments	$ 9,900