Dispositions - Additional Information (Details)			9 Months Ended
	May 05, 2025 USD ($) ft²	Jan. 17, 2025 USD ($) ft²	Sep. 30, 2025 USD ($) ft²	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Dispositions [Line items]
Area of office property | ft²			13,100,000
Restricted cash			$ 324,150,000	$ 173,510,000	$ 180,391,000	$ 81,391,000
Transaction of seller financing			$ 40,545,000
900 Third Avenue [Member]
Dispositions [Line items]
Disposition of asset interest percentage		45.00%	45.00%
Area of office property | ft²		600,000
Value of property		$ 210,000,000
Net Proceeds		$ 94,000,000
Restricted cash					$ 9,450,000
One Front Street [Member]
Dispositions [Line items]
Disposition of asset interest percentage	25.00%		25.00%
Area of office property | ft²	649,000
Value of property	$ 255,000,000
Net Proceeds	11,500,000
Transaction of seller financing	$ 40,545,000		$ 40,545,000	$ 0
Maturity term	2 years
Fixed rate	5.50%