Condensed Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenue		$ 1,518,340	$ 1,396,834
Costs of revenue, excluding depreciation and amortization		1,312,048	1,237,299
Depreciation and amortization		59,031	49,940
General and administrative expenses		72,616	63,622
Interest expense, net		22,258	17,058
Equity in earnings of unconsolidated affiliates		(6,260)	(5,585)
Other expense (income), net		3,507	(3,089)
Income before income taxes		55,140	37,589
Provision for income taxes		(12,033)	(11,126)
Net income		43,107	26,463
Net loss attributable to non-controlling interests		(5)	(97)
Net income attributable to MasTec, Inc.	[1]	$ 43,112	$ 26,560
Earnings per share (Note 2):
Basic earnings per share (in dollars per share)		$ 0.57	$ 0.33
Basic weighted average common shares outstanding		74,991	81,150
Diluted earnings per share (in dollars per share)		$ 0.57	$ 0.32
Diluted weighted average common shares outstanding		75,578	82,221

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