Document and Entity Information - shares
3 Months Ended
Mar. 31, 2016
May. 05, 2016
Document and Entity Information    
Entity Registrant Name Primoris Services Corp  
Entity Central Index Key 0001361538  
Document Type 10-Q  
Document Period End Date Mar. 31, 2016  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   51,772,497
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q1