Note 10 - Notes and Mortgages Payable - Repaid Notes (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Senior Unsecured Notes 1 [Member]
Amount Repaid	$ 500.0	[1]
Debt Instrument, Interest Rate, Stated Percentage	3.40%	[1]
Senior Unsecured Notes 2 [Member]
Amount Repaid	$ 36.1	[2]
Debt Instrument, Interest Rate, Stated Percentage	3.125%	[3]
Senior Unsecured Notes 3 [Member]
Amount Repaid	$ 11.0	[4]
Debt Instrument, Interest Rate, Stated Percentage	3.375%	[4]

[1] The Company incurred a prepayment charge of $6.5 million and $0.7 million in write-off of deferred financing costs resulting from the early repayment.

[2] Represents partial repayments. As of June 30, 2022, these notes had an outstanding principal of $313.9 million.

[3] Represents partial repayments. As of June 30, 2022, these notes had an outstanding principal of $313.9 million

[4] Represents partial repayments. As of June 30, 2022, these notes had an outstanding principal of $288.4 million.