Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 57,496	$ 65,198	$ 7,878	$ 59,681
Other comprehensive income (loss), net of tax
Net unrealized gain (loss) on cash flow hedges, net of tax	883	(1,906)	325	153
Less: reclassification for net gains (losses) included in interest expense, net of tax	(362)	0	(250)	3,042
Net change	521	(1,906)	75	3,195
Foreign currency translation adjustments, net	(422)	53	31	699
Other comprehensive income (loss), net of tax	99	(1,853)	106	3,894
Comprehensive income, net of tax	57,595	63,345	7,984	63,575
Non-controlling interests in comprehensive income, net of tax	128	4,104	9,723	1,569
Comprehensive income attributable to Granite Construction Incorporated, net of tax	$ 57,723	$ 67,449	$ 17,707	$ 65,144