Condensed Unaudited Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Statements Of Comprehensive Income [Abstract]
Net income	$ 14,170	$ 21,096
Foreign currency translation adjustment	1,123	32
Unrealized gain (loss) on available for sale securities:
Unrealized gain (loss) on available for sale securities	416	(46)
Less: Reclassification adjustment for sale of securities included in net income
Less: Benefit from (provision for) income taxes	(170)	15
Net unrealized gain (loss) on available for sale securities, net of tax	246	(31)
Comprehensive income	15,539	21,097
Comprehensive income (loss) attributable to noncontrolling interests	(2)	(10)
Comprehensive income attributable to MasTec, Inc.	$ 15,541	$ 21,107

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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