Condensed Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 83,332	$ 24,438	$ 123,959	$ 21,557
Other comprehensive income (loss):
Foreign currency translation gains, net of tax	595	247	1,774	5,871
Unrealized losses on equity investee activity, net of tax	(2,730)	(4,577)	(2,095)	(12,587)
Comprehensive income	81,197	20,108	123,638	14,841
Comprehensive income attributable to non-controlling interests	1,664	350	1,321	162
Comprehensive income attributable to MasTec, Inc.	$ 79,533	$ 19,758	$ 122,317	$ 14,679