Condensed Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 40,627	$ (2,881)
Other comprehensive income (loss):
Foreign currency translation gains, net of tax	1,178	5,624
Unrealized gains (losses) on equity investee activity, net of tax	636	(8,010)
Comprehensive income (loss)	42,441	(5,267)
Comprehensive loss attributable to non-controlling interests	(343)	(189)
Comprehensive income (loss) attributable to MasTec, Inc.	$ 42,784	$ (5,078)