Long-Term Debt - Mortgage Facilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Outstanding debt	$ 2,367.2	$ 2,165.5
Revolving Mortgage Facility
Debt Instrument [Line Items]
Maximum credit available	750.0
Current borrowing capacity	598.4
Outstanding debt	$ 598.0
Revolving Mortgage Facility | Minimum
Debt Instrument [Line Items]
Line of credit basis spread on variable rate, increase (decrease) (as a percent)	1.58%
Revolving Mortgage Facility | Maximum
Debt Instrument [Line Items]
Line of credit basis spread on variable rate, increase (decrease) (as a percent)	1.68%
Mortgage facilities
Debt Instrument [Line Items]
Outstanding debt	$ 1,024.3	$ 792.5