Note 14 - Notes Payable - Notes Payable (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Balance, Net		$ 7,027.1	$ 5,044.2
Weighted Average [Member]
Interest Rate	[1]	3.35%	3.33%
Notes Payable [Member]
Fair value debt adjustments, net		$ 81.0	$ 0.0
Deferred financing costs, net (2)	[2]	(56.0)	(55.8)
Unsecured Debt [Member]
Gross Balance		7,002.1
Fair value debt adjustments, net		81.0
Unsecured Debt [Member] | Notes Payable [Member]
Gross Balance		$ 7,002.1	$ 5,100.0
Unsecured Debt [Member] | Notes Payable [Member] | Minimum [Member]
Interest Rate		1.90%	1.90%
Unsecured Debt [Member] | Notes Payable [Member] | Maximum [Member]
Interest Rate		6.88%	4.45%
Line of Credit [Member] | Notes Payable [Member]
Gross Balance	[3]	$ 0.0	$ 0.0
Line of Credit [Member] | Notes Payable [Member] | Weighted Average [Member]
Interest Rate	[3]	0.87%	0.91%

[1] Weighted-average interest rate

[2] As of December 31, 2021 and 2020, the Company had $4.0 million and $5.6 million of deferred financing costs, net related to the Credit Facility that are included in Other assets on the Company’s Consolidated Balance Sheets, respectively.

[3] Accrues interest at a rate of LIBOR plus 0.765%.