Acquisitions - Operating Property Acquisitions (Details) $ in Millions	1 Months Ended			12 Months Ended
	Dec. 31, 2025 USD ($) ft² property	Sep. 30, 2025 USD ($) ft² property	Sep. 30, 2024 USD ($) ft² property	Dec. 31, 2025 USD ($) ft² property	Dec. 31, 2024 USD ($) ft² property
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Rentable square feet (unaudited)	16,292,164			16,292,164
2025 Acquisitions
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of Buildings \| property				5
Rentable square feet (unaudited)	538,532			538,532
Purchase price \| $				$ 397.3
3530 & 3550 John Hopkins Court and 3535 & 3565 General Atomics Court (Nautilus)
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of Buildings \| property	4
Rentable square feet (unaudited)	232,166			232,166
Purchase price \| $	$ 192.0
335-345 N. Maple Drive (Maple Plaza)
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of Buildings \| property		1
Rentable square feet (unaudited)		306,366
Purchase price \| $		$ 205.3
2024 Acquisitions
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of Buildings \| property					2
Rentable square feet (unaudited)					103,731
Purchase price \| $					$ 35.0
12707 & 12777 High Bluff Drive (Junction at Del Mar)
Schedule of Asset Acquisitions, by Acquisition [Line Items]
Number of Buildings \| property			2
Rentable square feet (unaudited)			103,731
Purchase price \| $			$ 35.0