Real Estate Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) ft² numberOfBuildings	Dec. 31, 2024 USD ($) ft² a numberOfBuildings	Dec. 31, 2023 USD ($) numberOfBuildings	Sep. 30, 2025 numberOfBuildings
Acquisitions [Abstract]
Rentable square feet of commercial real estate (in square feet) | ft²	27,500,000
Dispositions [Abstract]
Gains on disposition of property	$ 107,149	$ 46,817	$ 47,773
Impairments [Abstract]
Impairments of real estate assets	$ 8,800	$ 24,600	0
Number of assets | numberOfBuildings				2
Charlotte NC Building Acquisition
Acquisitions [Abstract]
Rentable square feet of commercial real estate (in square feet) | ft²	411,000
Purchase price of acquisition	$ 193,400
Charlotte NC Garage Acquisition
Acquisitions [Abstract]
Rentable square feet of commercial real estate (in square feet) | ft²	1,200,000
Purchase price of acquisition	$ 110,200
Number of parking spaces | numberOfBuildings	3,057
Raleigh NC Building Acquisition
Acquisitions [Abstract]
Rentable square feet of commercial real estate (in square feet) | ft²	346,000
Purchase price of acquisition	$ 137,900
Atlanta GA Ground Lease Acquisition [Member]
Acquisitions [Abstract]
Rentable square feet of commercial real estate (in square feet) | ft²		1,700,000
Purchase price of acquisition		$ 50,800
Number of buildings | numberOfBuildings		12
Undeveloped land suitable for future development (in acres) | a		13
Raleigh NC Land Acquisition
Acquisitions [Abstract]
Purchase price of acquisition			$ 2,700
2025 Dispositions
Dispositions [Abstract]
Number of buildings sold | numberOfBuildings	7
Sales price of disposition	$ 205,700
Gains on disposition of property	107,100
2024 Dispositions
Dispositions [Abstract]
Number of buildings sold | numberOfBuildings		10
Sales price of disposition		$ 105,300
Gains on disposition of property		$ 46,800
2023 Dispostions
Dispositions [Abstract]
Number of buildings sold | numberOfBuildings			4
Sales price of disposition			$ 103,800
Gains on disposition of property			47,800
Seller Financed Transaction [Member]
Dispositions [Abstract]
Sales price of disposition			21,000
Seller Financing [Abstract]
Proceeds from sale of real estate	$ 1,000		2,000
Non-recourse seller financing			$ 19,000
Term of debt instrument	1 year		2 years
Interest rate basis	SOFR		SOFR
Interest rate, basis spread (in hundredths)	1.50%		1.00%
2025 Impairments
Impairments [Abstract]
Impairments of real estate assets	$ 8,800
Number of assets | numberOfBuildings	2
2024 Impairments [Member]
Acquisitions [Abstract]
Rentable square feet of commercial real estate (in square feet) | ft²		616,000
Impairments [Abstract]
Impairments of real estate assets		$ 24,600