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. Shareholders' Equity [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2015	$ 329,880	$ 0	$ 198	$ 161,342	$ 116	$ 168,224	$ 329,880	$ 0
Balance (in shares) at Dec. 31, 2015			19,969
Net income	21,431					21,431	21,431
Stock issued under compensation plans, net	6,219		$ 6	6,213			6,219
Stock issued under compensation plans, net (in shares)			589
Tax benefit from stock-based awards	2,044			2,044			2,044
Stock-based compensation expense	4,674			4,674			4,674
Shares repurchased	(100,587)		$ (42)	(34,235)		(66,310)	(100,587)
Shares repurchased (in shares)			(4,228)
Other comprehensive income (loss)	(549)				(549)		(549)
Stock issued – other	62			62			62
Stock issued - other (in shares)			3
Balance at Dec. 31, 2016	263,174	0	$ 162	140,100	(433)	123,345	263,174	0
Balance (in shares) at Dec. 31, 2016			16,333
Net income	21,154					21,154	21,154
Adjustment to adopt ASU No. 2016-09 at Dec. 31, 2016	0			225		(225)
Stock issued under compensation plans, net	1,232		$ 2	1,230			1,232
Stock issued under compensation plans, net (in shares)			224
Stock-based compensation expense	4,376			4,376			4,376
Shares repurchased	(3,059)		$ (1)	(2,025)		(1,033)	(3,059)
Shares repurchased (in shares)			(93)
Other comprehensive income (loss)	134				134		134
Stock issued – other	28			28			28
Stock issued - other (in shares)			1
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	31,294					31,087	31,087	207
Adjustment to adopt ASC 606 at Dec. 31, 2017	695					695	695
Stock issued under compensation plans, net	1,897		$ 2	1,895			1,897
Stock issued under compensation plans, net (in shares)			132
Stock-based compensation expense	3,165			3,165			3,165
Shares repurchased	(1,043)			(756)		(287)	(1,043)
Shares repurchased (in shares)			(33)
Noncontrolling interest acquired	1,273							1,273
Other comprehensive income (loss)	106				106		106
Stock issued – other	38			38			38
Stock issued - other (in shares)			1
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