Note 15 - Mortgages Payable - Mortgages Payable (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Balance, Net		$ 7,027.1	$ 5,044.2
Weighted Average [Member]
Interest Rate	[1]	3.35%	3.33%
Mortgages [Member]
Gross Balance		$ 439.2	$ 308.4
Interest Rate	[1]	4.12%
Fair value debt adjustments, net		$ 10.8	3.5
Deferred financing costs, net		(1.3)	(0.6)
Balance, Net		$ 448.7	$ 311.3
Mortgages [Member] | Minimum [Member]
Interest Rate		3.23%	3.23%
Mortgages [Member] | Maximum [Member]
Interest Rate		7.23%	7.23%
Mortgages [Member] | Weighted Average [Member]
Interest Rate	[1]		4.73%

[1] Weighted-average interest rate