Condensed Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 64,201	$ 56,530	$ 188,160	$ 78,086
Other comprehensive income:
Foreign currency translation gains (losses), net of tax	641	(1,454)	2,415	4,417
Unrealized gains (losses) on equity investee activity, net of tax	808	(345)	(1,287)	(12,932)
Comprehensive income	65,650	54,731	189,288	69,571
Comprehensive income attributable to non-controlling interests	449	253	1,770	414
Comprehensive income attributable to MasTec, Inc.	$ 65,201	$ 54,478	$ 187,518	$ 69,157