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Goodwill and Intangible Assets - Finite Lived Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jan. 01, 2017 | Dec. 27, 2015 | Oct. 02, 2016
Finite-lived intangible assets |  |  |
Gross Amount | $ 141,767 |  | $ 144,044
Accumulated Amortization | (99,600) |  | (95,082)
Foreign currency translation adjustments | 900 |  |
Amortization expense | 5,900 | $ 4,300 |
Estimated amortization expense |  |  |
2017 | 16,286 |  |
2018 | 14,011 |  |
2019 | 6,871 |  |
2020 | 3,708 |  |
2021 | 651 |  |
Beyond | 640 |  |
Total | $ 42,167 |  |
Non-compete agreements |  |  |
Finite-lived intangible assets |  |  |
Weighted-Average Remaining Life (in Years) | 8 months 12 days |  |
Gross Amount | $ 876 |  | 881
Accumulated Amortization | $ (858) |  | (840)
Client relations |  |  |
Finite-lived intangible assets |  |  |
Weighted-Average Remaining Life (in Years) | 2 years 2 months 12 days |  |
Gross Amount | $ 111,166 |  | 112,367
Accumulated Amortization | $ (85,982) |  | (83,514)
Backlog |  |  |
Finite-lived intangible assets |  |  |
Weighted-Average Remaining Life (in Years) | 2 years |  |
Gross Amount | $ 22,229 |  | 23,018
Accumulated Amortization | $ (9,304) |  | (7,536)
Technology and trade names |  |  |
Finite-lived intangible assets |  |  |
Weighted-Average Remaining Life (in Years) | 3 years 7 months 6 days |  |
Gross Amount | $ 7,496 |  | 7,778
Accumulated Amortization | $ (3,456) |  | $ (3,192)

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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