XML 35 R1.htm IDEA: XBRL DOCUMENT v3.3.0.814
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2015
Oct. 23, 2015
Document Information [Line Items]    
Entity Registrant Name MYR GROUP INC.  
Entity Central Index Key 0000700923  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Trading Symbol MYRG  
Entity Common Stock, Shares Outstanding   20,616,702
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2015  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2015