Leases - Schedule of right-of-use assets and lease liabilities related to ground leases (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Key Terms:
Weighted-average remaining lease term (years)	64 years 10 months 24 days	69 years 10 months 24 days
Weighted-average discount rate	7.94%	7.51%
Land
Assets:
Right-of-use assets, at fair value	$ 40.5	$ 43.3
Liabilities:
Ground lease liabilities, at fair value	$ 40.5	$ 43.3