Leases - Schedule of right-of-use assets and lease liabilities related to ground leases (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Key Terms:
Weighted-average remaining lease term (years)	62 years 10 months 24 days	63 years 8 months 12 days
Weighted-average discount rate	8.58%	8.19%
Land
Assets:
Right-of-use assets, at fair value	$ 36.2	$ 39.4
Liabilities:
Ground lease liabilities, at fair value	$ 36.2	$ 39.4