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Goodwill and Intangible Assets - Amortization (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017
Finite-lived intangible assets |  |
Gross Amount | $ 86,237 | $ 118,995
Accumulated Amortization | (70,114) | (92,307)
Estimated amortization expense |  |
2019 | 9,016 |
2020 | 3,366 |
2021 | 2,271 |
2022 | 1,037 |
2023 | 433 |
Total | $ 16,123 |
Non-compete agreements |  |
Finite-lived intangible assets |  |
Weighted- Average Remaining Life (in years) | 0 years |
Gross Amount | $ 83 | 495
Accumulated Amortization | $ (83) | (493)
Client relations |  |
Finite-lived intangible assets |  |
Weighted- Average Remaining Life (in years) | 2 years 7 months 6 days |
Gross Amount | $ 54,639 | 90,297
Accumulated Amortization | $ (46,449) | (75,074)
Backlog |  |
Finite-lived intangible assets |  |
Weighted- Average Remaining Life (in years) | 6 months |
Gross Amount | $ 23,371 | 21,518
Accumulated Amortization | $ (20,007) | (13,301)
Technology and trade names |  |
Finite-lived intangible assets |  |
Weighted- Average Remaining Life (in years) | 3 years 2 months 12 days |
Gross Amount | $ 8,144 | 6,685
Accumulated Amortization | $ (3,575) | $ (3,439)

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