UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (loss) [Member]	Retained Earnings [Member]	MYR Group Inc. Stockholders' Equity [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2017	$ 287,039	$ 0	$ 163	$ 143,934	$ (299)	$ 143,241	$ 287,039	$ 0
Balance (in shares) at Dec. 31, 2017			16,465
Net income	5,644					5,644	5,644
Adjustment to adopt ASU No. 2016-09 at Dec. 31, 2017	695					695	695
Stock issued under compensation plans, net	581		$ 1	580			581
Stock issued under compensation plans, net (in shares)			57
Stock-based compensation expense	420			420			420
Shares repurchased	(934)			(674)		(260)	(934)
Shares repurchased (in shares)			(30)
Other comprehensive income	(17)				(17)		(17)
Balance at Mar. 31, 2018	293,428	0	$ 164	144,260	(316)	149,320	293,428	0
Balance (in shares) at Mar. 31, 2018			16,492
Balance at Dec. 31, 2018	324,464	0	$ 165	148,276	(193)	174,736	322,984	1,480
Balance (in shares) at Dec. 31, 2018			16,565
Net income	6,620					7,353	7,353	(733)
Stock issued under compensation plans, net	282			282			282
Stock issued under compensation plans, net (in shares)			68
Stock-based compensation expense	951			951			951
Shares repurchased	(778)			(571)		(207)	(778)
Shares repurchased (in shares)			(23)
Other comprehensive income	(77)				(77)		(77)
Stock issued - other	12		$ 12				12
Balance at Mar. 31, 2019	$ 331,474	$ 0	$ 177	$ 148,938	$ (270)	$ 181,882	$ 330,727	$ 747
Balance (in shares) at Mar. 31, 2019			16,610