Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue
Total revenue	$ 1,116,820	$ 1,008,910	$ 2,575,440	$ 2,512,043
Cost of revenue
Total cost of revenue	950,177		2,273,352
Gross profit	166,643	115,055	302,088	272,713
Selling, general and administrative expenses	74,794	61,795	212,479	192,036
Other costs, net	19,843	(490)	37,973	22,401
Gain on sales of property and equipment, net	(1,812)	(949)	(7,793)	(10,462)
Operating income	73,818		59,429
Other (income) expense
Loss on debt extinguishment	0		51,052
Interest income	(4,293)		(11,287)
Interest expense	4,877		11,899
Net income from affiliates	(7,147)		(19,378)	(9,656)
Other (income) expense, net	462		(2,713)
Total other (income) expense, net	(6,101)	(2,789)	29,573	1,747
Income before income taxes	79,919	57,488	29,856	66,991
Provision for (benefit from) income taxes	22,423	(7,710)	21,978	7,310
Net income	57,496	$ 65,198	7,878	$ 59,681
Amount attributable to non-controlling interests	128		9,723
Net income attributable to Granite Construction Incorporated	$ 57,624		$ 17,601
Net income per share attributable to common shareholders
Basic (USD per share)	$ 1.31	$ 1.58	$ 0.40	$ 1.37
Diluted (USD per share)	$ 1.13	$ 1.36	$ 0.40	$ 1.25
Weighted average shares outstanding:
Basic (shares)	43,924,000	43,973,000	43,861,000	44,739,000
Diluted (shares)	53,612,000	51,863,000	44,447,000	52,613,000
As Restated
Revenue
Total revenue		$ 1,008,910		$ 2,512,043
Cost of revenue
Total cost of revenue		893,855		2,239,330
Gross profit		115,055		272,713
Selling, general and administrative expenses		61,795		192,036
Other costs, net		(490)		22,401
Gain on sales of property and equipment, net		(949)		(10,462)
Operating income		54,699		68,738
Other (income) expense
Loss on debt extinguishment		0		0
Interest income		(1,894)		(3,246)
Interest expense		2,519		10,003
Net income from affiliates		(3,491)		(9,656)
Other (income) expense, net		77		4,646
Total other (income) expense, net		(2,789)		1,747
Net income				59,681
Amount attributable to non-controlling interests		4,104		1,569
Net income attributable to Granite Construction Incorporated		$ 69,302		$ 61,250
Net income per share attributable to common shareholders
Basic (USD per share)		$ 1.58		$ 1.37
Diluted (USD per share)		$ 1.36		$ 1.25
Weighted average shares outstanding:
Basic (shares)		43,973,000		44,739,000
Diluted (shares)		51,863,000		52,613,000
Construction
Revenue
Total revenue	$ 945,698		$ 2,198,527
Cost of revenue
Total cost of revenue	808,536		1,945,506
Construction | As Restated
Revenue
Total revenue		$ 847,371		$ 2,138,858
Cost of revenue
Total cost of revenue		754,354		1,907,110
Materials
Revenue
Total revenue	171,122		376,913
Cost of revenue
Total cost of revenue	$ 141,641		$ 327,846
Materials | As Restated
Revenue
Total revenue		161,539		373,185
Cost of revenue
Total cost of revenue		$ 139,501		$ 332,220