Construction Joint Ventures - Schedule of Unconsolidated Construction Joint Ventures Revenue and Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Guarantor Obligations [Line Items]
Cost of revenue	$ 795,466	$ 751,681	$ 1,323,175	$ 1,345,475
Decrease to net income/increase to net loss	(23,846)	19,578	(49,618)	(5,517)
Granite’s interest in net income (loss)			(4,005)	(17,228)
Collaborative Arrangement
Guarantor Obligations [Line Items]
Revenue	9,520	23,190	24,365	72,845
Cost of revenue	14,652	36,265	28,619	89,534
Granite’s interest in gross loss	(5,132)	(13,075)	(4,254)	(16,689)
Granite’s interest in net income (loss)	(4,916)	(13,601)	(4,005)	(17,228)
Collaborative Arrangement | Corporate Joint Venture
Guarantor Obligations [Line Items]
Revenue	25,211	91,564	63,385	252,703
Cost of revenue	40,564	93,162	84,935	251,083
Decrease to net income/increase to net loss	(14,574)	(2,871)	(20,228)	296
Collaborative Arrangement | Co-venturer | Other Partners Interest in Partnerships
Guarantor Obligations [Line Items]
Revenue	15,691	68,374	39,020	179,858
Cost of revenue	25,912	56,897	56,316	161,549
Decrease to net income/increase to net loss	$ (9,658)	$ 10,730	$ (16,223)	$ 17,524