Goodwill and Intangible Assets (Tables)

12 Months Ended

Jul. 29, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

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 25, 2015	$	467,420	$	(195,767	)	$	271,653
Purchase price allocation adjustments	101		—			101
Goodwill from fiscal 2016 acquisitions	38,403		—			38,403
Balance as of July 30, 2016	505,924		(195,767		)	310,157
Goodwill from fiscal 2017 acquisition	10,087		—			10,087
Purchase price allocation adjustments from fiscal 2016 acquisitions	1,504		—			1,504
Balance as of July 29, 2017	$	517,515	$	(195,767	)	$	321,748

Impairment Calculation Rates

The table below outlines certain assumptions used in the Company’s fiscal 2017, 2016, and 2015 annual quantitative impairment analyses:



	2017	2016	2015
Terminal Growth Rate	2.0% - 3.0%	2.0% - 3.0%	1.5% - 2.5%
Discount Rate	11.0%	11.5%	11.5%

Schedule of Intangible Assets

The Company’s intangible assets consisted of the following (dollars in thousands):



	July 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	12.1	$	299,717	$	124,084	$	175,633	$	289,955	$	101,012	$	188,943
Trade names	7.7	10,350		7,285		3,065		9,800		6,034		3,766
UtiliQuest trade name	—	4,700		—		4,700		4,700		—		4,700
Non-compete agreements	2.5	450		287		163		685		329		356
Contract backlog	—	—		—		—		4,780		4,666		114
		$	315,217	$	131,656	$	183,561	$	309,920	$	112,041	$	197,879

Future Amortization Expense

As of July 29, 2017, total amortization expense for existing finite-lived intangible assets for each of the five succeeding fiscal years and thereafter is as follows (dollars in thousands):



	Amount
2018	$	23,113
2019	20,757
2020	19,847
2021	18,452
2022	14,899
Thereafter	81,793
Total	$	178,861