Condensed Unaudited Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Income Statement [Abstract]
Revenue	$ 1,309,596		$ 1,269,385		$ 3,378,180		$ 3,165,657
Costs of revenue, excluding depreciation and amortization	1,122,961		1,081,132		2,914,904		2,695,287
Depreciation and amortization	41,747		37,756		111,996		103,111
General and administrative expenses	59,889		58,976		167,454		159,761
Interest expense, net	12,643		12,666		37,595		34,549
Loss on extinguishment of debt	0		0		0		5,624
Other income, net	(1,416)		(2,778)		(5,424)		(3,283)
Income from continuing operations before income taxes	73,772		81,633		151,655		170,608
Provision for income taxes	(28,042)		(31,698)		(57,671)		(65,822)
Net income from continuing operations	45,730		49,935		93,984		104,786
Discontinued operations:
Net loss from discontinued operations, including loss on disposal and impairment charges (See Note 4)	(320)		(3,735)		(592)		(5,165)
Net income	45,410		46,200		93,392		99,621
Net income attributable to non-controlling interests	139		62		48		172
Net income attributable to MasTec, Inc.	$ 45,271		$ 46,138		$ 93,344		$ 99,449
Basic earnings (loss) per share:
Continuing operations	$ 0.56		$ 0.65		$ 1.19		$ 1.36
Discontinued operations	$ 0.00		$ (0.05)		$ (0.01)		$ (0.07)
Total basic earnings per share	$ 0.55	[1]	$ 0.60	[1]	$ 1.18	[1]	$ 1.29	[1]
Basic weighted average common shares outstanding	81,811		77,093		79,158		76,816
Diluted earnings (loss) per share:
Continuing operations	$ 0.53		$ 0.59		$ 1.09		$ 1.24
Discontinued operations	$ 0.00		$ (0.04)		$ (0.01)		$ (0.06)
Total diluted earnings per share	$ 0.53	[1]	$ 0.54	[1]	$ 1.08	[1]	$ 1.18	[1]
Diluted weighted average common shares outstanding	85,824		85,464		86,416		84,733

[1] Earnings per share calculations may contain slight summation differences due to rounding.