Condensed Unaudited Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Income Statement [Abstract]
Revenue	$ 1,104,556		$ 977,624		$ 2,068,585		$ 1,896,272
Costs of revenue, excluding depreciation and amortization	950,889		822,655		1,791,943		1,614,154
Depreciation and amortization	36,755		33,602		70,249		65,355
General and administrative expenses	54,237		51,900		107,564		100,785
Interest expense, net	12,949		11,838		24,952		21,883
Loss on extinguishment of debt	0		0		0		5,624
Other (income) expense, net	(2,051)		322		(4,007)		(504)
Income from continuing operations before income taxes	51,777		57,307		77,884		88,975
Provision for income taxes	(19,714)		(21,776)		(29,630)		(34,124)
Net income from continuing operations	32,063		35,531		48,254		54,851
Discontinued operations:
Net loss from discontinued operations (See Note 4)	(149)		(484)		(272)		(1,431)
Net income	31,914		35,047		47,982		53,420
Net (loss) income attributable to non-controlling interests	(136)		106		(91)		109
Net income attributable to MasTec, Inc.	$ 32,050		$ 34,941		$ 48,073		$ 53,311
Basic earnings (loss) per share:
Continuing operations	$ 0.41		$ 0.46		$ 0.62		$ 0.71
Discontinued operations	$ 0.00		$ (0.01)		$ 0.00		$ (0.02)
Total basic earnings per share	$ 0.41	[1]	$ 0.46	[1]	$ 0.62	[1]	$ 0.70	[1]
Basic weighted average common shares outstanding	78,269		76,741		77,810		76,675
Diluted earnings (loss) per share:
Continuing operations	$ 0.37		$ 0.42		$ 0.56		$ 0.65
Discontinued operations	$ 0.00		$ (0.01)		$ 0.00		$ (0.02)
Total diluted earnings per share	$ 0.37	[1]	$ 0.41	[1]	$ 0.56	[1]	$ 0.63	[1]
Diluted weighted average common shares outstanding	86,730		84,558		86,675		84,337

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