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Acquisitions (Details) (USD $) |  |  | 3 Months Ended |
--- | --- | --- | --- | ---
Oct. 25, 2014 | Jul. 26, 2014 | Oct. 25, 2014 Hewitt Power & Communications, Inc | Apr. 26, 2014 Telecommunications Specialty Construction Contractor, Canada | Jul. 26, 2014 Watts Brothers | Oct. 25, 2014 Watts Brothers
Business Acquisition [Line Items] |  |  |  |  |  |
Acquisition payments |  |  | $ 8,000,000 | $ 700,000 | $ 16,400,000 |
Finite-Lived Intangible Assets, Gross |  |  | 5,800,000 |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid For Working Capital |  |  |  |  |  | 300,000
Goodwill | 269,465,000 | 269,088,000 |  |  |  | 1,600,000
Finite-Lived Customer Relationships, Gross |  |  |  |  |  | 8,500,000
Property, Plant and Equipment, Gross | $ 573,039,000 | $ 558,710,000 |  |  |  | $ 3,700,000

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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date to an asset acquired in a business combination representing a favorable existing relationship with customers having a finite beneficial life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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