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Goodwill and Intangible Assets - Finite Lived Assets (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Jun. 28, 2020 | Sep. 29, 2019
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | $ 101,486 | $ 96,722
Accumulated Amortization | (89,029) | (80,282)
Estimated amortization expense |  |
2020 | 2,561 |
2021 | 5,960 |
2022 | 2,229 |
2023 | 1,506 |
2024 | 201 |
Total | $ 12,457 |
Client relations |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted- Average Remaining Life (in Years) | 2 years 9 months 18 days |
Gross Amount | $ 58,909 | 56,779
Accumulated Amortization | $ (52,479) | (50,455)
Backlog |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted- Average Remaining Life (in Years) | 8 months 12 days |
Gross Amount | $ 34,770 | 32,229
Accumulated Amortization | $ (30,668) | (24,968)
Trade names |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted- Average Remaining Life (in Years) | 1 year 10 months 24 days |
Gross Amount | $ 7,807 | 7,714
Accumulated Amortization | $ (5,882) | $ (4,859)

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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