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Concentration of Credit Risk | 9 Months Ended
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Apr. 23, 2016
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 68.8% and 60.1% of its total contract revenues during the nine months ended April 23, 2016 and April 25, 2015, respectively. Customers whose contract revenues exceeded 10% of total contract revenue during the three or nine months ended April 23, 2016 or April 25, 2015 were as follows:
| For the Three Months Ended |  | For the Nine Months Ended
| April 23, 2016 |  | April 25, 2015 |  | April 23, 2016 |  | April 25, 2015
AT&T Inc. | 26.8% |  | 21.3% |  | 22.8% |  | 21.5%
Comcast Corporation | 14.4% |  | 13.3% |  | 13.3% |  | 13.0%
CenturyLink, Inc. | 13.7% |  | 13.9% |  | 14.7% |  | 13.7%
Verizon Communications Inc. | 10.4% |  | 7.5% |  | 10.6% |  | 7.1%
Customers whose combined amounts of trade accounts receivable and costs and estimated earnings in excess of billings, net (“CIEB, net”) exceeded 10% of total combined trade receivables and CIEB, net as of April 23, 2016 or July 25, 2015 were as follows: AT&T Inc. - $161.9 million, or 23.0% as of April 23, 2016 and $101.7 million, or 17.7% as of July 25, 2015; Comcast Corporation - $92.0 million, or 13.1% as of April 23, 2016 and $63.0 million, or 11.0% as of July 25, 2015; CenturyLink, Inc. - $79.4 million, or 11.3% as of April 23, 2016 and $80.1 million, or 14.0% as of July 25, 2015; Windstream Corporation - $73.9 million, or 10.5% as of April 23, 2016 and $47.8 million, or 8.3% as of July 25, 2015; and Verizon Communications Inc. - $71.6 million, or 10.2% as of April 23, 2016 and $50.8 million, or 8.9% as of July 25, 2015. Additionally, another customer had $84.3 million, or 12.0% as of April 23, 2016 and $64.5 million, or 11.2% as of July 25, 2015; The Company believes that none of its significant customers were 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 23, 2016. 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.

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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=51801978&loc=d3e6327-108592 Reference 2: 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=49121117&loc=d3e13531-108611 Reference 3: 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=51801978&loc=d3e6404-108592 Reference 4: 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=51801978&loc=d3e6442-108592 Reference 5: 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=51801978&loc=d3e6351-108592 Reference 6: 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=49121117&loc=d3e13537-108611 + Details
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