Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue
Total revenue	$ 560,068	$ 653,886
Cost of revenue
Total cost of revenue	527,709	593,794
Gross profit	32,359	60,092
Selling, general and administrative expenses	73,122	70,120
Other costs, net	4,523	6,279
Gain on sales of property and equipment, net	(2,037)	(598)
Operating loss	(43,249)	(15,709)
Other (income) expense
Interest income	(3,762)	(570)
Interest expense	2,891	3,585
Equity in income (loss) of affiliates	(5,187)	(1,289)
Other (income) expense, net	(1,950)	1,308
Total other (income) expense, net	(8,008)	3,034
Loss before income taxes	(35,241)	(18,743)
Provision for (benefit from) income taxes	(9,469)	6,352
Net loss	(25,772)	(25,095)
Amount attributable to non-controlling interests	2,749	(1,638)
Net loss attributable to Granite Construction Incorporated	$ (23,023)	$ (26,733)
Net income (loss) per share attributable to common shareholders
Basic loss per share (in dollars per share)	$ (0.53)	$ (0.58)
Diluted loss per share (in dollars per share)	$ (0.53)	$ (0.58)
Basic (in shares)	43,764	45,730
Diluted (in shares)	43,764	45,730
Construction [Member]
Revenue
Total revenue	$ 503,416	$ 578,266
Cost of revenue
Total cost of revenue	466,711	519,787
Materials [Member]
Revenue
Total revenue	56,652	75,620
Cost of revenue
Total cost of revenue	$ 60,998	$ 74,007