Condensed Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue		$ 1,396,834	$ 1,158,184
Costs of revenue, excluding depreciation and amortization		1,237,299	971,134
Depreciation and amortization		49,940	42,904
General and administrative expenses		63,622	64,781
Interest expense, net		17,058	12,597
Equity in earnings of unconsolidated affiliates		(5,585)	(1,646)
Other (income) expense, net		(3,089)	429
Income before income taxes		37,589	67,985
Provision for income taxes		(11,126)	(27,358)
Net income		26,463	40,627
Net loss attributable to non-controlling interests		(97)	(343)
Net income attributable to MasTec, Inc.	[1]	$ 26,560	$ 40,970
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)		$ 0.33	$ 0.51
Basic weighted average common shares outstanding		81,150	80,697
Diluted earnings per share (in dollars per share)		$ 0.32	$ 0.50
Diluted weighted average common shares outstanding		82,221	82,157

[1] Calculated as total net income less amounts attributable to non-controlling interests.