Condensed Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 7,442	$ 49,125	$ (2,766)	$ 94,855
Other comprehensive (loss) income (See Note 12):
Foreign currency translation adjustments, net of tax	(13,330)	(12,951)	(32,050)	(10,611)
Comprehensive (loss) income	(5,888)	36,174	(34,816)	84,244
Comprehensive (loss) income attributable to non-controlling interests	(176)	139	(420)	48
Comprehensive (loss) income attributable to MasTec, Inc.	$ (5,712)	$ 36,035	$ (34,396)	$ 84,196