Condensed Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 43,107	$ 26,463
Other comprehensive (loss) income:
Foreign currency translation losses, net of tax	(100)	(523)
Unrealized (losses) gains on equity investee activity, net of tax	(5,462)	7,716
Comprehensive income	37,545	33,656
Comprehensive loss attributable to non-controlling interests	(5)	(97)
Comprehensive income attributable to MasTec, Inc.	$ 37,550	$ 33,753