Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Guarantor Obligations [Line Items]
Cost of revenue	$ 950,177		$ 2,273,352
Changes to net income (loss)	57,496	$ 65,198	7,878	$ 59,681
Granite’s interest in net income (loss)			(4,535)	25,066
Collaborative Arrangement
Guarantor Obligations [Line Items]
Revenue	16,004	25,355	40,369	98,200
Cost of revenue	7,536	33,293	36,155	122,827
Granite’s interest in gross profit (loss)	8,468	(7,938)	4,214	(24,627)
Granite’s interest in net income (loss)	8,540	(7,839)	4,535	(25,067)
Collaborative Arrangement | Corporate Joint Venture
Guarantor Obligations [Line Items]
Revenue	(18,391)	69,355	44,994	322,058
Cost of revenue	(10,607)	81,694	74,328	332,777
Changes to net income (loss)	(7,514)	(11,945)	(27,742)	(11,649)
Collaborative Arrangement | Co-venturer | Other Partners Interest in Partnerships
Guarantor Obligations [Line Items]
Revenue	(34,395)	44,000	4,625	223,858
Cost of revenue	(18,143)	48,401	38,173	209,950
Changes to net income (loss)	$ (16,054)	$ (4,106)	$ (32,277)	$ 13,418