Note 13 - Mortgages Payable - Mortgages Payable (Details) - USD ($) $ in Millions		Dec. 31, 2023	Dec. 31, 2022
Balance, Net		$ 7,262.9	$ 6,781.0
Weighted Average [Member]
Interest Rate	[1]	3.66%	3.45%
Mortgages [Member]
Gross Balance		$ 355.7	$ 379.3
Interest Rate	[1]	4.22%
Fair value debt adjustments, net		$ (0.6)	(0.7)
Deferred financing costs, net		(1.2)	(1.7)
Balance, Net		$ 353.9	$ 376.9
Mortgages [Member] | Minimum [Member]
Interest Rate			3.23%
Mortgages [Member] | Maximum [Member]
Interest Rate			7.23%
Mortgages [Member] | Weighted Average [Member]
Interest Rate	[1]		4.16%

[1] Weighted-average interest rate