Condensed Unaudited Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 35,047	$ 30,089	$ 53,420	$ 44,258
Foreign currency translation (losses) gains	(5,952)	(995)	(6,775)	129
Changes in value of available for sale securities (See Note 7 - Securities Available For Sale):
Unrealized (losses) gains on available for sale securities, before tax	(13)	(506)	346	(89)
Reversal and reclassification adjustments:
Reversal of unrealized gains, net, on sold or redeemed securities	(388)	0	(388)	0
Reclassification adjustment for unrealized gains on sold securities, recognized in earnings	(717)	0	(717)	0
Benefit from income taxes	431	211	293	40
Changes in value of available for sale securities, net of tax	(687)	(295)	(466)	(49)
Comprehensive income	28,408	28,799	46,179	44,338
Comprehensive income (loss) attributable to non-controlling interests	106	(3)	109	(6)
Comprehensive income attributable to MasTec, Inc.	$ 28,302	$ 28,802	$ 46,070	$ 44,344

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