Condensed Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 26,463	$ 40,627
Other comprehensive income:
Foreign currency translation (losses) gains, net of tax	(523)	1,178
Unrealized gains on equity investee activity, net of tax	7,716	636
Comprehensive income	33,656	42,441
Comprehensive loss attributable to non-controlling interests	(97)	(343)
Comprehensive income attributable to MasTec, Inc.	$ 33,753	$ 42,784