XML 12 R1.htm IDEA: XBRL DOCUMENT v3.20.2
Cover Page - shares
 9 Months Ended
Sep. 30, 2020
Oct. 23, 2020
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2020  
Document Transition Report false  
Entity File Number 1-08325  
Entity Registrant Name MYR GROUP INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 36-3158643  
Entity Address, Address Line One 1701 Golf Road,  
Entity Address, Address Line Two Suite 3-1012  
Entity Address, City or Town Rolling Meadows,  
Entity Address, State or Province IL  
Entity Address, Postal Zip Code 60008  
City Area Code 847  
Local Phone Number 290-1891  
Title of 12(b) Security Common Stock, $0.01 par value  
Trading Symbol MYRG  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   16,727,116
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0000700923  
Current Fiscal Year End Date --12-31