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Concentration of Credit Risk
 12 Months Ended
Jul. 26, 2014
Risks and Uncertainties [Abstract]  
Concentration of Credit Risk
Concentration of Credit Risk

The Company is subject to concentrations of credit risk relating primarily to its cash and equivalents, trade accounts receivable and costs and estimated earnings in excess of billings. The Company grants credit under normal payment terms, generally without collateral, to its customers. These customers primarily consist of telephone companies, cable television multiple system operators, telecommunication equipment and infrastructure providers, and electric and gas utilities and other. With respect to a portion of the services provided to these customers, the Company has statutory lien rights which may in certain circumstances assist in the Company’s collection efforts. Adverse changes in overall business and economic factors may impact the Company’s customers and increase credit risks. These risks may be heightened as a result of economic weakness and market volatility. In the past, some of the Company’s customers have experienced significant financial difficulties and likewise, some may experience financial difficulties in the future. These difficulties expose the Company to increased risks related to the collectability of amounts due for services performed.

The Company’s customer base is highly concentrated, with its top five customers accounting for approximately 58.3%, 58.5% and 59.6% of its total revenues in fiscal 2014, 2013 and 2012, respectively. Customers whose revenues exceeded 10% of total revenue during fiscal 2014, 2013 or 2012 are as follows:
 
Fiscal Year Ended
 
2014
 
2013
 
2012
AT&T Inc.
19.2%
 
15.5%
 
13.7%
CenturyLink, Inc.
13.8%
 
14.6%
 
13.6%
Comcast Corporation
11.7%
 
10.9%
 
12.6%
Verizon Communications Inc.
8.2%
 
9.6%
 
11.3%


Customers representing 10% or more of combined amounts of trade accounts receivable and costs and estimated earnings in excess of billings, net as of July 26, 2014 or July 27, 2013 had the following outstanding balances and the related percentage of the Company’s total outstanding balances:
 
July 26, 2014
 
July 27, 2013
 
Amount
 
% of Total
 
Amount
 
% of Total
 
 
 
(Dollars in millions)
 
 
AT&T Inc.
$
87.6

 
17.9
%
 
$
57.4

 
12.6
%
CenturyLink, Inc.
$
48.2

 
9.8
%
 
$
62.6

 
13.7
%
Windstream Corporation
$
43.6

 
8.9
%
 
$
59.4

 
13.0
%

 
The Company believes that none of its significant customers was experiencing financial difficulties that would materially impact the collectability of the Company's trade accounts receivable and costs in excess of billings as of July 26, 2014 and July 27, 2013. See Note 4, Accounts Receivable, and Note 5, Costs and Estimated Earnings in Excess of Billings, for additional information regarding the Company's trade accounts receivable and costs and estimated earnings in excess of billings.