Note 5 - Impairments - Asset Impairment Charges (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Asset Impairment Charges, Total		$ 14,043	$ 21,958	$ 3,597
Total impairment charges		14,000	22,000	3,600
Properties Marketed for Sale [Member]
Asset Impairment Charges, Total	[1],[2]	14,000	21,600	2,700
Cost Method Investment [Member]
Asset Impairment Charges, Total		$ 0	$ 400	$ 900

[1] Amounts relate to adjustments to property carrying values for properties which the Company has marketed for sale and as such has adjusted the anticipated hold periods for such properties. The Company’s estimated fair values of these assets were primarily based upon estimated sales prices from signed contracts or letters of intent from third-party offers, which were less than the carrying value of the assets.

[2] During 2022, the Company recognized impairment charges of $19.2 million, before noncontrolling interests of $16.0 million, related to five properties.