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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of carrying value of goodwill | The following table summarizes the changes in the carrying value of goodwill:
| GSG |  | CIG |  | Total
| (in thousands)
Balance at October 2, 2016 | $ | 357,050 |  |  | $ | 360,938 |  |  | $ | 717,988 |
Acquisition activity | — |  |  | 7,055 |  |  | 7,055 |
Translation and other | 4,711 |  |  | 11,132 |  |  | 15,843 |
Balance at October 1, 2017 | 361,761 |  |  | 379,125 |  |  | 740,886 |
Acquisition activity | 27,526 |  |  | 58,353 |  |  | 85,879 |
Divestiture activity | — |  |  | (12,160 | ) |  | (12,160 | )
Translation and other | 454 |  |  | (16,239 | ) |  | (15,785 | )
Balance at September 30, 2018 | $ | 389,741 |  |  | $ | 409,079 |  |  | $ | 798,820 |
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
| September 30, 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 | 2.6 |  | 54,639 |  |  | (46,449 | ) |  | 90,297 |  |  | (75,074 | )
Backlog | 0.5 |  | 23,371 |  |  | (20,007 | ) |  | 21,518 |  |  | (13,301 | )
Technology and trade names | 3.2 |  | 8,144 |  |  | (3,575 | ) |  | 6,685 |  |  | (3,439 | )
Total |  |  | $ | 86,237 |  |  | $ | (70,114 | ) |  | $ | 118,995 |  |  | $ | (92,307 | )
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)
2019 | $ | 9,016 |
2020 | 3,366 |
2021 | 2,271 |
2022 | 1,037 |
2023 | 433 |
Total | $ | 16,123 |

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- Definition Tabular disclosure of the characteristics, including gross value, accumulated amortization amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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