Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 28, 2020	Jun. 28, 2019
Document and Entity Information
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	MYR GROUP INC.
Entity Central Index Key	0000700923
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 506.5
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Trading Symbol	MYRG
Entity Interactive Data Current	Yes
Entity Common Stock, Shares Outstanding		16,657,072
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Current Reporting Status	Yes
Entity Shell Company	false