Revisions in Estimates (Tables)

3 Months Ended

Mar. 31, 2024

Quarterly Financial Information Disclosure [Abstract]

Schedule of Change in Accounting Estimates

The projects with decreases from revisions in estimates, which individually had an impact of $5.0 million or more on gross profit, are summarized as follows (dollars in millions, except per share data):

	Three Months Ended March 31,
		2024		2023
Number of projects with downward estimate changes		1		2
Range of reduction in gross profit from each project, net	$	7.7	$	6.2 - 11.4
Decrease to project profitability, net	$	7.7	$	17.6
Increase to net loss	$	5.8	$	13.1
Amounts attributable to non-controlling interests	$	—	$	5.7
Increase to net loss attributable to Granite Construction Incorporated	$	5.8	$	7.5
Increase to net loss per diluted share attributable to common shareholders	$	0.13	$	0.17