Condensed Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 1,111,010	$ 1,315,488	$ 3,180,906	$ 3,380,538
Costs of revenue, excluding depreciation and amortization	972,711	1,122,861	2,805,072	2,914,901
Depreciation and amortization	42,196	41,747	128,048	111,996
General and administrative expenses	63,798	59,889	207,077	167,454
Interest expense, net	11,964	12,643	35,845	37,595
Other expense (income), net	6,702	(1,416)	4,342	(5,424)
Income from continuing operations before income taxes	13,639	79,764	522	154,016
Provision for income taxes	(6,197)	(30,319)	(3,288)	(58,569)
Net income (loss) from continuing operations	7,442	49,445	(2,766)	95,447
Discontinued operations:
Net loss from discontinued operations	0	(320)	0	(592)
Net income (loss)	7,442	49,125	(2,766)	94,855
Net (loss) income attributable to non-controlling interests	(176)	139	(420)	48
Net income (loss) attributable to MasTec, Inc.	$ 7,618	$ 48,986	$ (2,346)	$ 94,807
Basic earnings (loss) per share:
Continuing operations	$ 0.10	$ 0.60	$ (0.03)	$ 1.21
Discontinued operations	0.00	0.00	0.00	(0.01)
Total basic earnings (loss) per share	$ 0.10	$ 0.60	$ (0.03)	$ 1.20
Basic weighted average common shares outstanding	79,845	81,811	80,681	79,158
Diluted earnings (loss) per share:
Continuing operations	$ 0.09	$ 0.57	$ (0.03)	$ 1.11
Discontinued operations	0.00	0.00	0.00	(0.01)
Total diluted earnings (loss) per share	$ 0.09	$ 0.57	$ (0.03)	$ 1.10
Diluted weighted average common shares outstanding	80,448	85,824	80,681	86,416