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Goodwill and Intangible Assets - Finite Lived Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 29, 2019 | Sep. 29, 2019 | Sep. 30, 2018
Finite-lived intangible assets |  |  |
Gross Amount | $ 98,096 | $ 96,722 |
Accumulated Amortization | (84,015) | $ (80,282) |
Estimated amortization expense |  |  |
2020 | 6,770 |  |
2021 | 4,729 |  |
2022 | 1,660 |  |
2023 | 922 |  |
Total | $ 14,081 |  |
Non-compete agreements |  |  |
Finite-lived intangible assets |  |  |
Weighted- Average Remaining Life (in Years) | 0 years |  |
Client relations |  |  |
Finite-lived intangible assets |  |  |
Weighted- Average Remaining Life (in Years) | 2 years 9 months 18 days |  |
Gross Amount | $ 57,065 |  | $ 56,779
Accumulated Amortization | $ (51,401) |  | (50,455)
Backlog |  |  |
Finite-lived intangible assets |  |  |
Weighted- Average Remaining Life (in Years) | 1 year 2 months 12 days |  |
Gross Amount | $ 33,112 |  | 32,229
Accumulated Amortization | $ (27,312) |  | (24,968)
Trade names |  |  |
Finite-lived intangible assets |  |  |
Weighted- Average Remaining Life (in Years) | 2 years 2 months 12 days |  |
Gross Amount | $ 7,919 |  | 7,714
Accumulated Amortization | $ (5,302) |  | $ (4,859)

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