Note 21 - Reportable Segment Information - Segment Reporting Information (Details) - USD ($) $ in Thousands		3 Months Ended								6 Months Ended	9 Months Ended	12 Months Ended
		Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total revenue		$ 789,213	$ 1,008,910	$ 849,247	$ 653,886	$ 805,651	$ 1,062,129	$ 964,172	$ 669,913	$ 1,503,133	$ 2,512,043	$ 3,301,256	$ 3,501,865	$ 3,562,459
Total gross profit from reportable segments		96,781	115,055	97,566	60,092	62,446	$ 119,935	$ 116,946	$ 63,318	157,658	272,713	369,494	362,645	344,788
Depreciation, depletion and amortization												68,336	97,236	102,151
Segment assets as of period end (1)		2,167,933	$ 2,402,652	$ 2,284,906	$ 2,263,279	2,494,927				$ 2,284,906	$ 2,402,652	2,167,933	2,494,927
Constructions [Member]
Total revenue												2,803,935	3,076,190	3,181,697
Total gross profit from reportable segments												303,881	303,228	280,169
Depreciation, depletion and amortization												41,836	71,106	79,597
Materials [Member]
Total revenue												497,321	425,675	380,762
Total gross profit from reportable segments												65,613	59,417	64,619
Depreciation, depletion and amortization												26,500	26,130	22,554
Operating Segments [Member]
Total revenue												3,475,363	3,663,790	3,730,136
Segment assets as of period end (1)	[1]	797,204				691,650						797,204	691,650
Operating Segments [Member] | Constructions [Member]
Total revenue												2,803,935	3,076,190	3,181,697
Segment assets as of period end (1)	[1]	432,868				358,561						432,868	358,561
Operating Segments [Member] | Materials [Member]
Total revenue												671,428	587,600	548,439
Segment assets as of period end (1)	[1]	$ 364,336				$ 333,089						364,336	333,089
Consolidation, Eliminations [Member]
Total revenue												(174,107)	(161,925)	(167,677)
Consolidation, Eliminations [Member] | Constructions [Member]
Total revenue												0	0	0
Consolidation, Eliminations [Member] | Materials [Member]
Total revenue												$ (174,107)	$ (161,925)	$ (167,677)

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