Goodwill and Intangible Assets (Tables)

12 Months Ended

Oct. 01, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of carrying value of goodwill

The following table summarizes the changes in the carrying value of goodwill:

	WEI		RME			Total
	(in thousands)
Balance at September 27, 2015	$	210,748	$	390,631		$	601,379
Goodwill additions	9,080		98,538			107,618
Goodwill adjustments	—		1,687			1,687
Foreign exchange translation	2,125		5,179			7,304
Balance at October 2, 2016	221,953		496,035			717,988
Goodwill additions	—		7,055			7,055
Goodwill adjustments	13,509		(12,804		)	705
Foreign exchange translation	6,273		8,865			15,138
Balance at October 1, 2017	$	241,735	$	499,151		$	740,886

Summary of acquired identifiable intangible assets with finite useful lives

The gross amount and accumulated amortization of our acquired identifiable intangible assets with finite useful lives included in "Intangible assets – net" on the consolidated balance sheets, were as follows:

	Fiscal Year Ended
	October 1, 2017						October 2, 2016
	Weighted- Average Remaining Life (in years)	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
	($ in thousands)
Non-compete agreements	0.1	$	495	$	(493	)	$	881	$	(840	)
Client relations	2.9	90,297		(75,074		)	112,367		(83,514		)
Backlog	1.4	21,518		(13,301		)	23,018		(7,536		)
Technology and trade names	3.3	6,685		(3,439		)	7,778		(3,192		)
Total		$	118,995	$	(92,307	)	$	144,044	$	(95,082	)

Estimated amortization expense for the succeeding five years and beyond

Estimated amortization expense for the succeeding five years and beyond is as follows:

	Amount
	(in thousands)
2018	$	14,548
2019	7,034
2020	2,802
2021	1,664
2022	411
Beyond	229
Total	$	26,688