Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Common Stock
Common stock, shares authorized	90,000,000	90,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares issued	53,124,899	53,194,585
Common stock, shares outstanding	53,124,899	53,194,585
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
Proceeds from issuance of common stock	$ 585	$ 178,707	$ 578
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
Employees of Future Infrastructure Holdings, LLC
Common Stock
Discounted price from the average December market price at which shares purchased by participants in LTR Plan (as a percent)		15.00%
Issuance of shares, net of issuance costs (in shares)		1,038,309
Proceeds from issuance of common stock		$ 28,900
Compensation expense recognized		$ 5,100
RSUs
Common Stock
Conversion of Restricted Stock Units, net of shares withheld for taxes (in shares)	131,709	122,690	57,112
Equity Plan
Common Stock
Shares of common stock issued as a part of quarterly compensation of non-employee members of the Board of Directors	42,080	32,920	47,928
Equity Plan | RSUs
Common Stock
Compensation expense recognized	$ 7,400	$ 10,500	$ 2,300
Primoris Long Term Retention Plan
Common Stock
Shares of common stock issued under the long-term incentive plan	23,782	25,987	34,524
Amount received in exchange for shares of common stock under a long term incentive plan	$ 600	$ 500	$ 600
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%