Note 5 - Disaggregation of Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue	$ 1,009,806	$ 1,062,129	$ 2,514,194	$ 2,696,214
CALIFORNIA
Revenue	348,425	319,769	809,907	820,112
Central [Member]
Revenue	232,093	302,145	688,546	862,532
Mountain [Member]
Revenue	429,288	440,215	1,015,741	1,013,570
Constructions [Member]
Revenue	848,267	924,454	2,141,009	2,369,848
Constructions [Member] | CALIFORNIA
Revenue	263,252	243,740	607,536	631,637
Constructions [Member] | Central [Member]
Revenue	222,745	296,505	654,912	837,792
Constructions [Member] | Mountain [Member]
Revenue	362,270	384,209	878,561	900,419
Materials [Member]
Revenue	161,539	137,675	373,185	326,366
Materials [Member] | CALIFORNIA
Revenue	85,173	76,029	202,371	188,475
Materials [Member] | Central [Member]
Revenue	9,348	5,640	33,634	24,740
Materials [Member] | Mountain [Member]
Revenue	$ 67,018	$ 56,006	$ 137,180	$ 113,151