Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Operations [Abstract]
Revenue	$ 774,230	$ 865,313	$ 750,942	$ 618,492	$ 730,740	$ 631,947	$ 495,113	$ 450,231	$ 3,008,977	$ 2,308,031	$ 1,623,502
Costs of revenue, excluding depreciation and amortization									2,606,091	1,938,882	1,376,125
Depreciation and amortization									75,228	57,966	49,539
General and administrative expenses									148,432	126,658	96,932
Interest expense, net									34,423	29,105	24,690
Gain on remeasurement of equity interest in acquiree									(29,041)
Other (income) expense, net									(183)	1,420	(2,917)
Income before provision for income taxes									174,027	154,000	79,133
Provision for income taxes									(68,055)	(63,613)	(8,385)
Net income									105,972	90,387	70,748
Net loss attributable to non-controlling interests									(29)	(141)
Net income attributable to MasTec	$ 8,559	$ 31,842	$ 44,494	$ 21,106	$ 38,510	$ 30,006	$ 14,601	$ 7,411	$ 106,001	$ 90,528	$ 70,748
Earnings per share - basic and diluted (See Note 2 - Earnings Per Share)
Basic net income per share attributable to MasTec	$ 0.10	$ 0.38	$ 0.54	$ 0.27	$ 0.50	$ 0.39	$ 0.19	$ 0.10	$ 1.29	$ 1.19	$ 0.93
Basic weighted average common shares outstanding									82,182	76,132	75,701
Diluted net income per share attributable to MasTec	$ 0.10	$ 0.36	$ 0.51	$ 0.26	$ 0.44	$ 0.35	$ 0.18	$ 0.10	$ 1.23	$ 1.05	$ 0.90
Diluted weighted average common shares outstanding									86,718	90,913	81,763