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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Dec. 30, 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 September 30, 2018 |  | $ | 389,741 |  |  | $ | 409,079 |  |  | $ | 798,820 |
Translation and other |  | (3,563 | ) |  | (12,693 | ) |  | (16,256 | )
Balance at December 30 2018 |  | $ | 386,178 |  |  | $ | 396,386 |  |  | $ | 782,564 |
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:
| December 30, 2018 |  | September 30, 2018
| Weighted- Average Remaining Life (in Years) |  | Gross Amount |  | Accumulated Amortization |  | Gross Amount |  | Accumulated Amortization
| ($ in thousands)
Non-compete agreements | — |  | $ | — |  |  | $ | — |  |  | $ | 83 |  |  | $ | (83 | )
Client relations | 2.6 |  | 54,057 |  |  | (47,534 | ) |  | 54,639 |  |  | (46,449 | )
Backlog | 0.4 |  | 22,991 |  |  | (21,544 | ) |  | 23,371 |  |  | (20,007 | )
Trade names | 3.0 |  | 7,972 |  |  | (3,958 | ) |  | 8,144 |  |  | (3,575 | )
Total |  |  | $ | 85,020 |  |  | $ | (73,036 | ) |  | $ | 86,237 |  |  | $ | (70,114 | )
Schedule of estimated amortization expense for remainder of fiscal and succeeding years | Estimated amortization expense for the remainder of fiscal 2019 and succeeding years is as follows:
| Amount
| (in thousands)
2019 | $ | 4,954 |
2020 | 3,331 |
2021 | 2,249 |
2022 | 1,021 |
2023 | 429 |
Total | $ | 11,984 |

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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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