UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Contract revenues	$ 607,901	$ 583,214	$ 1,639,422	$ 1,500,084
Contract costs	531,429	524,017	1,440,013	1,354,848
Gross profit	76,472	59,197	199,409	145,236
Selling, general and administrative expenses	51,443	41,667	137,688	108,598
Amortization of intangible assets	578	1,419	3,009	2,888
Gain on sale of property and equipment	(478)	(1,151)	(1,967)	(2,548)
Income from operations	24,929	17,262	60,679	36,298
Other income (expense):
Interest income	0	0	6	0
Interest expense	(1,113)	(2,125)	(3,941)	(4,498)
Other income (expense), net	18	(922)	(556)	406
Income before provision for income taxes	23,834	14,215	56,188	32,206
Income tax expense	6,542	3,754	15,579	8,767
Net income	17,292	10,461	40,609	23,439
Less: net income (loss) attributable to noncontrolling interest	0	106	0	(1,476)
Net income attributable to MYR Group Inc.	$ 17,292	$ 10,355	$ 40,609	$ 24,915
Income per common share attributable to MYR Group Inc.:
Basic (in dollars per share)	$ 1.04	$ 0.62	$ 2.44	$ 1.50
Diluted (in dollars per share)	$ 1.02	$ 0.62	$ 2.42	$ 1.49
Weighted average number of common shares and potential common shares outstanding:
Basic (in shares)	16,698	16,614	16,670	16,576
Diluted (in shares)	16,882	16,714	16,798	16,692
Net income	$ 17,292	$ 10,461	$ 40,609	$ 23,439
Other comprehensive income (loss):
Foreign currency translation adjustment	(5)	1	43	(199)
Other comprehensive income (loss):	(5)	1	43	(199)
Total comprehensive income	17,287	10,462	40,652	23,240
Less: net income (loss) attributable to noncontrolling interest	0	106	0	(1,476)
Total comprehensive income attributable to MYR Group Inc.	$ 17,287	$ 10,356	$ 40,652	$ 24,716