Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Nov. 01, 2022
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2022
Entity File Number	001-34145
Entity Registrant Name	Primoris Services Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-4743916
Entity Address, Address Line One	2300 N. Field Street, Suite 1900
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75201
City Area Code	214
Local Phone Number	740-5600
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $0.0001 par value
Trading Symbol	PRIM
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		53,111,107
Entity Central Index Key	0001361538
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false