Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Guarantor Obligations [Line Items]
Cost of revenue	$ 617,990	$ 527,709
Changes to net income (loss)	(29,442)	(25,772)
Granite’s interest in net income (loss)	(2,290)	(911)
Collaborative Arrangement
Guarantor Obligations [Line Items]
Revenue	10,230	14,845
Cost of revenue	8,481	13,967
Granite’s interest in gross profit	1,749	878
Granite’s interest in net income (loss)	2,290	911
Collaborative Arrangement | Corporate Joint Venture
Guarantor Obligations [Line Items]
Revenue	8,717	38,174
Cost of revenue	18,751	44,371
Changes to net income (loss)	(8,149)	(5,654)
Collaborative Arrangement | Co-venturer | Other Partners Interest in Partnerships
Guarantor Obligations [Line Items]
Revenue	(1,513)	23,329
Cost of revenue	10,270	30,404
Changes to net income (loss)	$ (10,439)	$ (6,565)