Goodwill and Intangible Assets (Tables)

6 Months Ended

Apr. 01, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of changes in the carrying value of goodwill

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

	GSG			CIG			Total
	(in thousands)
Balance at October 1, 2017	$	361,761		$	379,125		$	740,886
Goodwill additions	26,726			54,275			81,001
Foreign exchange impact	(2,138		)	(10,059		)	(12,197		)
Balance at April 1, 2018	$	386,349		$	423,341		$	809,690

Summary of gross amount and accumulated amortization 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 our consolidated balance sheets, were as follows:

	April 1, 2018						October 1, 2017
	Weighted- Average Remaining Life (in Years)	Gross Amount		Accumulated Amortization			Gross Amount		Accumulated Amortization
	($ in thousands)
Non-compete agreements	0.0	$	83	$	(83	)	$	495	$	(493	)
Client relations	2.7	54,643		(43,119		)	90,297		(75,074		)
Backlog	0.8	23,184		(16,443		)	21,518		(13,301		)
Trade names	2.8	5,248		(2,666		)	6,685		(3,439		)
Total		$	83,158	$	(62,311	)	$	118,995	$	(92,307	)

Schedule of estimated amortization expense for remainder of fiscal and succeeding years

Estimated amortization expense for the remainder of fiscal 2018 and succeeding years is as follows:

	Amount
	(in thousands)
2018	$	8,300
2019	7,471
2020	2,786
2021	1,650
2022	411
Beyond	229
Total	$	20,847