Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 22, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
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	12150 East 112th Avenue
Entity Address, City or Town	Henderson,
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80640
City Area Code	303
Local Phone Number	286-8000
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)		16,869,947
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000700923
Current Fiscal Year End Date	--12-31