Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 130,082	$ 120,542	$ 293,411	$ 227,406
Other comprehensive (loss) income:
Foreign currency translation (losses) gains, net of tax	(334)	1,230	(321)	(945)
Unrealized (losses) gains on equity investee activity, net of tax	(7,108)	3,137	(21,302)	13,790
Comprehensive income	122,640	124,909	271,788	240,251
Comprehensive income (loss) attributable to non-controlling interests	1,486	(124)	1,993	(312)
Comprehensive income attributable to MasTec, Inc.	$ 121,154	$ 125,033	$ 269,795	$ 240,563