Condensed Unaudited Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 16,068	$ 18,373
Other comprehensive (loss) income:
Activity, net of tax (See Note 13)	(5,335)	(603)
Comprehensive income	10,733	17,770
Comprehensive income attributable to non-controlling interests	45	3
Comprehensive income attributable to MasTec, Inc.	10,688	17,767
Foreign Currency [Member]
Other comprehensive (loss) income:
Activity, net of tax (See Note 13)	(5,335)	(824)
Available-for-Sale-Securities [Member]
Other comprehensive (loss) income:
Activity, net of tax (See Note 13)	$ 0	$ 221