Acquisitions	12 Months Ended
Jul. 25, 2015
Business Combinations [Abstract]
Acquisitions	Acquisitions Fiscal 2015 - During the first quarter of fiscal 2015, the Company acquired Hewitt Power & Communications, Inc. ("Hewitt") for $8.0 million, net of cash acquired. Hewitt provides specialty contracting services primarily for telecommunications providers in the Southeastern United States. The Company acquired the assets of two cable installation contractors for an aggregate purchase price of $1.5 million during the second quarter of fiscal 2015. During the fourth quarter of fiscal 2015, the Company acquired Moll's Utility Services, LLC ("Moll's") for $6.5 million, net of cash acquired. Moll's provides specialty contracting services primarily for utilities in the Midwest United States. The Company also acquired the assets of Venture Communications Group, LLC ("Venture") for $15.6 million during the fourth quarter of fiscal 2015. Venture provides specialty contracting services primarily for telecommunications providers in the Midwest and Southeastern United States. Purchase price allocations of businesses acquired during the fourth quarter of fiscal 2015 are preliminary and will be completed during fiscal 2016 when valuations are finalized for intangible assets and other amounts. Goodwill of $2.2 million and amortizing intangible assets of $22.0 million related to businesses acquired in fiscal 2015 is expected to be deductible for tax purposes. Goodwill largely consists of expected synergies resulting from the acquisitions, including the expansion of the Company's geographic scope and strengthening of its customer base. See Note 7, Goodwill and Intangible Assets, for further information on amortization and estimated useful lives of intangible assets acquired. Additionally, see Note 21, Subsequent Events, regarding businesses acquired subsequent to fiscal 2015. Fiscal 2014 - During the third quarter of fiscal 2014, the Company acquired a telecommunications specialty construction contractor in Canada for $0.7 million. Additionally, during the fourth quarter of fiscal 2014, the Company acquired Watts Brothers Cable Construction, Inc. ("Watts Brothers") for $16.4 million. Watts Brothers provides specialty contracting services primarily for telecommunications providers in the Midwest and Southeastern United States. Fiscal 2013 - On December 3, 2012, the Company acquired substantially all of the telecommunications infrastructure services subsidiaries (the "Acquired Subsidiaries") of Quanta Services, Inc. for the sum of $275.0 million in cash, an adjustment of approximately $40.4 million for working capital received in excess of a target amount, and approximately $3.7 million for other specified items. The Acquired Subsidiaries provide specialty contracting services, including engineering, construction, maintenance and installation services to telecommunications providers, and other construction and maintenance services to electric and gas utilities and others. Principal business facilities are located in Arizona, California, Florida, Georgia, Minnesota, New York, Pennsylvania and Washington. Pro forma contract revenues, income before taxes, and net income of the Acquired Subsidiaries were $1.837 billion, $90.0 million and $54.4 million, respectively, for fiscal 2013, resulting in basic and diluted pro forma earnings per share of $1.65 and $1.61, respectively. This unaudited pro forma information presents the Company's consolidated results of operations as if the acquisition of the Acquired Subsidiaries had occurred on July 31, 2011, the first day of the Company's 2012 fiscal year and includes certain adjustments, including depreciation and amortization expense based on the estimated fair value of the assets acquired, interest expense related to the Company's debt financing of the transaction, and the income tax impact of these adjustments. Pro forma earnings during fiscal 2013 have been adjusted to reflect amortization and depreciation as if the acquisition had occurred on July 31, 2011. This includes the impact of amortization expense, including customer relationships and contract backlog which is being recognized on an accelerated basis related to the expected economic benefit. Pro forma results also reflect depreciation expense which is recognized over the estimated useful lives of the related property and equipment. The unaudited pro forma information is not necessarily indicative of the results of operations of the combined companies had the acquisition occurred at the beginning of the periods presented nor is it indicative of future results. During the fourth quarter of fiscal 2013, the Company acquired Sage Telecommunications Corp. of Colorado, LLC ("Sage") and certain assets of a tower construction and maintenance company for a combined total of $11.3 million, net of cash acquired. Sage provides telecommunications construction and project management services primarily for cable operators in the Western United States. The results of these acquisitions are included in the consolidated financial statements from their respective closing dates. The results from businesses acquired during fiscal 2015, fiscal 2014, and the fourth quarter of fiscal 2013 were not considered material to the Company's consolidated financial statements, individually or in the aggregate.

Acquisitions

Fiscal 2015 - During the first quarter of fiscal 2015, the Company acquired Hewitt Power & Communications, Inc. ("Hewitt") for $8.0 million, net of cash acquired. Hewitt provides specialty contracting services primarily for telecommunications providers in the Southeastern United States. The Company acquired the assets of two cable installation contractors for an aggregate purchase price of $1.5 million during the second quarter of fiscal 2015. During the fourth quarter of fiscal 2015, the Company acquired Moll's Utility Services, LLC ("Moll's") for $6.5 million, net of cash acquired. Moll's provides specialty contracting services primarily for utilities in the Midwest United States. The Company also acquired the assets of Venture Communications Group, LLC ("Venture") for $15.6 million during the fourth quarter of fiscal 2015. Venture provides specialty contracting services primarily for telecommunications providers in the Midwest and Southeastern United States. Purchase price allocations of businesses acquired during the fourth quarter of fiscal 2015 are preliminary and will be completed during fiscal 2016 when valuations are finalized for intangible assets and other amounts. Goodwill of $2.2 million and amortizing intangible assets of $22.0 million related to businesses acquired in fiscal 2015 is expected to be deductible for tax purposes. Goodwill largely consists of expected synergies resulting from the acquisitions, including the expansion of the Company's geographic scope and strengthening of its customer base. See Note 7, Goodwill and Intangible Assets, for further information on amortization and estimated useful lives of intangible assets acquired. Additionally, see Note 21, Subsequent Events, regarding businesses acquired subsequent to fiscal 2015.

Fiscal 2014 - During the third quarter of fiscal 2014, the Company acquired a telecommunications specialty construction contractor in Canada for $0.7 million. Additionally, during the fourth quarter of fiscal 2014, the Company acquired Watts Brothers Cable Construction, Inc. ("Watts Brothers") for $16.4 million. Watts Brothers provides specialty contracting services primarily for telecommunications providers in the Midwest and Southeastern United States.

Fiscal 2013 - On December 3, 2012, the Company acquired substantially all of the telecommunications infrastructure services subsidiaries (the "Acquired Subsidiaries") of Quanta Services, Inc. for the sum of $275.0 million in cash, an adjustment of approximately $40.4 million for working capital received in excess of a target amount, and approximately $3.7 million for other specified items. The Acquired Subsidiaries provide specialty contracting services, including engineering, construction, maintenance and installation services to telecommunications providers, and other construction and maintenance services to electric and gas utilities and others. Principal business facilities are located in Arizona, California, Florida, Georgia, Minnesota, New York, Pennsylvania and Washington.

Pro forma contract revenues, income before taxes, and net income of the Acquired Subsidiaries were $1.837 billion, $90.0 million and $54.4 million, respectively, for fiscal 2013, resulting in basic and diluted pro forma earnings per share of $1.65 and $1.61, respectively. This unaudited pro forma information presents the Company's consolidated results of operations as if the acquisition of the Acquired Subsidiaries had occurred on July 31, 2011, the first day of the Company's 2012 fiscal year and includes certain adjustments, including depreciation and amortization expense based on the estimated fair value of the assets acquired, interest expense related to the Company's debt financing of the transaction, and the income tax impact of these adjustments. Pro forma earnings during fiscal 2013 have been adjusted to reflect amortization and depreciation as if the acquisition had occurred on July 31, 2011. This includes the impact of amortization expense, including customer relationships and contract backlog which is being recognized on an accelerated basis related to the expected economic benefit. Pro forma results also reflect depreciation expense which is recognized over the estimated useful lives of the related property and equipment. The unaudited pro forma information is not necessarily indicative of the results of operations of the combined companies had the acquisition occurred at the beginning of the periods presented nor is it indicative of future results.

During the fourth quarter of fiscal 2013, the Company acquired Sage Telecommunications Corp. of Colorado, LLC ("Sage") and certain assets of a tower construction and maintenance company for a combined total of $11.3 million, net of cash acquired. Sage provides telecommunications construction and project management services primarily for cable operators in the Western United States.

The results of these acquisitions are included in the consolidated financial statements from their respective closing dates. The results from businesses acquired during fiscal 2015, fiscal 2014, and the fourth quarter of fiscal 2013 were not considered material to the Company's consolidated financial statements, individually or in the aggregate.