Condensed Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 56,530	$ 7,442	$ 78,086	$ (2,766)
Other comprehensive income (loss):
Foreign currency translation (losses) gains, net of tax	(1,454)	(13,330)	4,417	(32,050)
Unrealized losses on equity investee activity, net of tax	(345)	0	(12,932)	0
Comprehensive income (loss)	54,731	(5,888)	69,571	(34,816)
Comprehensive income (loss) attributable to non-controlling interests	253	(176)	414	(420)
Comprehensive income (loss) attributable to MasTec, Inc.	$ 54,478	$ (5,712)	$ 69,157	$ (34,396)