Condensed Unaudited Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (6,388)	$ 12,142
Other comprehensive (loss) income (See Note 12):
Foreign currency translation adjustments, net of tax	(22,028)	(5,336)
Comprehensive (loss) income	(28,416)	6,806
Comprehensive (loss) income attributable to non-controlling interests	(125)	45
Comprehensive (loss) income attributable to MasTec, Inc.	$ (28,291)	$ 6,761