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Concentration of Credit Risk | 9 Months Ended
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Apr. 26, 2014
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 accounting for approximately 58.5% and 58.6% of its total revenues during the nine months ended April 26, 2014 and April 27, 2013, respectively. Revenues from three of the top five customers exceeded 10% of total revenue during the three or nine months ended April 26, 2014 or April 27, 2013:
| For the Three Months Ended |  | For the Nine Months Ended
| April 26, 2014 |  | April 27, 2013 |  | April 26, 2014 |  | April 27, 2013
AT&T Inc. ("AT&T") | 20.8% |  | 17.4% |  | 18.9% |  | 15.0%
CenturyLink, Inc. ("CenturyLink") | 12.8% |  | 14.3% |  | 14.3% |  | 14.3%
Comcast Corporation ("Comcast") | 12.1% |  | 10.1% |  | 11.5% |  | 11.2%
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 April 26, 2014 and July 27, 2013. Customers representing 10% or more of combined amounts of trade accounts receivable and costs and estimated earnings in excess of billings as of April 26, 2014 or July 27, 2013 had the following outstanding balances and the related percentage of the Company’s total outstanding balances:
| April 26, 2014 |  | July 27, 2013
| Amount |  | % of Total |  | Amount |  | % of Total
|  |  | (Dollars in millions) |  |
AT&T | $ | 73.8 |  |  | 17.1 | % |  | $ | 57.4 |  |  | 12.6 | %
CenturyLink | $ | 46.4 |  |  | 10.7 | % |  | $ | 62.6 |  |  | 13.7 | %
Windstream Corporation | $ | 34.5 |  |  | 8.0 | % |  | $ | 59.4 |  |  | 13.0 | %

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 + Details
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