Mortgages Payable - Summary of Mortgages Payable (Details) - Mortgages payable: $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) mortgage property	Dec. 31, 2023 USD ($) mortgage property
Debt
Number of properties | property	49	131
Weighted Average Stated Interest Rate (as a percent)	4.30%	4.80%
Weighted Average Effective Interest Rate (as a percent)	4.60%	3.30%
Weighted Average Remaining Years Until Maturity	1 year 3 months 18 days	4 months 24 days
Remaining Principal Balance	$ 201.0	$ 822.4
Unamortized Premium (Discount) and Deferred Financing Costs Balance, net	(0.9)	(0.8)
Mortgage Payable Balance	$ 200.1	$ 821.6
Number of mortgages | mortgage	14	16
Number of Sterling-denominated mortgages paid quarterly | mortgage	1	1
Minimum
Debt
Weighted Average Effective Interest Rate (as a percent)	0.80%	0.50%
Stated interest rate (as a percent)	3.00%	3.00%
Maximum
Debt
Weighted Average Effective Interest Rate (as a percent)	6.60%	6.60%
Stated interest rate (as a percent)	6.90%	6.90%