Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue	$ 560,068	$ 653,886
Constructions [Member]
Revenue	503,416	578,266
Materials [Member]
Revenue	56,652	75,620
CALIFORNIA
Revenue	179,085	191,996
CALIFORNIA | Constructions [Member]
Revenue	148,947	146,309
CALIFORNIA | Materials [Member]
Revenue	30,138	45,687
Central [Member]
Revenue	182,558	230,256
Central [Member] | Constructions [Member]
Revenue	171,002	219,894
Central [Member] | Materials [Member]
Revenue	11,556	10,362
Mountain [Member]
Revenue	198,425	231,634
Mountain [Member] | Constructions [Member]
Revenue	183,467	212,063
Mountain [Member] | Materials [Member]
Revenue	$ 14,958	$ 19,571