Concentrations Of Risk

12 Months Ended

Dec. 31, 2011

Concentrations Of Risk [Abstract]

Concentrations Of Risk

Note 17 - Concentrations of Risk

The Company is subject to certain risk factors, including, but not limited to: risks related to seasonality of its business, adverse weather conditions, economic downturns, technological and regulatory changes in the industries it serves; competition within its industry; the nature of its contracts, which do not obligate MasTec's customers to undertake any infrastructure projects and may be canceled on short notice; collectibility of receivables; acquisition integration and financing; availability of qualified employees; recoverability of goodwill; potential exposures to environmental liabilities; and exposure to multi-employer pension plan liabilities.

The Company grants credit, generally without collateral, to its customers. Consequently, the Company is subject to potential credit risk related to changes in business and economic factors. However, MasTec generally has certain lien rights on that work and concentration of credit risk is limited due to the diversity of the customer base. The Company believes its billing and collection policies are adequate to minimize potential credit risk.

Revenue concentration information, as a percent of total consolidated revenue, is as follows:

	2011			2010			2009
Revenue from top ten customers		71	%		72	%		72	%
Revenue from specific customers:
DIRECTV®		23	%		24	%		30	%
AT&T		23	%		20	%		16	%

In addition, the Company derived 8% of its revenues for the year ended December 31, 2011 from El Paso Corporation.