Note 10 - Investments in Affiliates - Equity Method Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	[1]
Total investments in affiliates	$ 80,725	$ 23,368
Foreign Affiliates [Member]
Total investments in affiliates	58,579	0
Real Estate Entities [Member]
Total investments in affiliates	8,517	9,619
Asphalt Terminal Entity [Member]
Total investments in affiliates	$ 13,629	$ 13,749

[1] These balances do not include amounts held for sale (see Note 2).