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Concentration of Credit Risk
6 Months Ended
Jan. 24, 2015
Risks and Uncertainties [Abstract]  
Concentration of Credit Risk
Concentration of Credit Risk

The Company’s customer base is highly concentrated, with its top five customers in each period accounting for approximately 59.8% and 58.2% of its total revenues during the six months ended January 24, 2015 and January 25, 2014, respectively. Customers whose revenues exceeded 10% of total revenue during the three or six months ended January 24, 2015 or January 25, 2014 are as follows:
 
For the Three Months Ended
 
For the Six Months Ended
 
January 24, 2015
 
January 25, 2014
 
January 24, 2015
 
January 25, 2014
AT&T Inc.
22.0%
 
18.7%
 
21.6%
 
18.0%
CenturyLink, Inc.
14.0%
 
14.4%
 
13.5%
 
15.0%
Comcast Corporation
13.1%
 
12.0%
 
12.9%
 
11.2%


Customers representing 10% or more of combined amounts of trade accounts receivable and costs and estimated earnings in excess of billings, net as of January 24, 2015 or July 26, 2014 had the following outstanding balances and the related percentage of the Company’s total outstanding balances:
 
January 24, 2015
 
July 26, 2014
 
Amount
 
% of Total
 
Amount
 
% of Total
 
 
 
(Dollars in millions)
 
 
AT&T Inc.
$
84.1

 
18.1
%
 
$
87.6

 
17.9
%
Comcast Corporation
$
50.1

 
10.8
%
 
$
48.9

 
9.9
%
CenturyLink, Inc.
$
46.7

 
10.1
%
 
$
48.2

 
9.8
%