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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Apr. 29, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | Changes in the carrying amount of goodwill for fiscal 2017 were as follows (dollars in thousands):
| Goodwill |  | Accumulated Impairment Losses |  | Total
Balance as of July 30, 2016 | $ | 505,924 |  |  | $ | (195,767 | ) |  | $ | 310,157 |
Goodwill from fiscal 2017 acquisition | 10,309 |  |  | — |  |  | 10,309 |
Purchase price allocation adjustments from fiscal 2016 acquisitions | 2,769 |  |  | — |  |  | 2,769 |
Balance as of April 29, 2017 | $ | 519,002 |  |  | $ | (195,767 | ) |  | $ | 323,235 |
Impairment Calculation Rates | The table below outlines certain assumptions in each of the Company’s fiscal 2016, 2015, and 2014 annual quantitative impairment analyses:
| 2016 |  | 2015 |  | 2014
Terminal Growth Rate | 2.0% - 3.0% |  | 1.5% - 2.5% |  | 1.5% - 3.0%
Discount Rate | 11.5% |  | 11.5% |  | 11.5%
Schedule of Intangible Assets | The Company’s intangible assets consisted of the following (dollars in thousands):
| April 29, 2017 |  | July 30, 2016
| Weighted Average Remaining Useful Lives (Years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Intangible Assets, Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Intangible Assets, Net
Customer relationships | 12.3 |  | $ | 299,717 |  |  | $ | 118,203 |  |  | $ | 181,514 |  |  | $ | 289,955 |  |  | $ | 101,012 |  |  | $ | 188,943 |
Trade names | 7.3 |  | 10,350 |  |  | 6,914 |  |  | 3,436 |  |  | 9,800 |  |  | 6,034 |  |  | 3,766 |
UtiliQuest trade name | — |  | 4,700 |  |  | — |  |  | 4,700 |  |  | 4,700 |  |  | — |  |  | 4,700 |
Non-compete agreements | 2.5 |  | 685 |  |  | 484 |  |  | 201 |  |  | 685 |  |  | 329 |  |  | 356 |
Contract backlog | — |  | — |  |  | — |  |  | — |  |  | 4,780 |  |  | 4,666 |  |  | 114 |
|  |  | $ | 315,452 |  |  | $ | 125,601 |  |  | $ | 189,851 |  |  | $ | 309,920 |  |  | $ | 112,041 |  |  | $ | 197,879 |

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