Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common Stock
Common stock, shares authorized	90,000,000	90,000,000
Common stock, par value (in dollars per share)	$ 0.1000	$ 0.1000
Common stock, shares issued	53,740,729	53,366,327
Common stock, shares outstanding	53,740,729	53,366,327
Period of restriction on trade for shares issued to non-employee members of the board of directors under the Primoris Long-term Retention Plan		1 year
Preferred Stock
Preferred stock, authorized (in shares)	1,000,000	1,000,000
Par value of preferred stock (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares outstanding	0	0
Restricted Stock Units
Common Stock
Conversion of stock based awards, net of shares withheld for taxes (in shares)	322,713	168,605	131,709
Equity Plans, 2013 and 2023
Common Stock
Shares of common stock issued as a part of quarterly compensation of non-employee members of the Board of Directors	24,792	39,040	42,080
Primoris Long Term Retention Plan
Common Stock
Shares of common stock issued under the long-term incentive plan	11,359	21,245,000	23,782,000
Amount received in exchange for shares of common stock under a long term incentive plan	$ 0.3	$ 0.3	$ 0.6
Percentage of average market closing prices used in determining number of common stock that could be purchased by participants	75.00%	75.00%	75.00%