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Goodwill and Intangibles - Schedule of Acquired Intangibles in Accompanying Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 28, 2018 | Sep. 29, 2017 | Sep. 30, 2016
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 332,920 | $ 336,922 |
Acquisitions | 416,952 | 35,905 |
Post-Acquisition Adjustments relating to prior year acquisition | (3,421) |  |
Amortization | (80,731) | (46,095) | $ (47,608)
Foreign currency translation | (9,763) | 4,305 |
Ending balance | $ 655,957 | 332,920 | 336,922
Weighted Average Amortization Period (years) | 9 years |  |
Customer Relationships, Contracts and Backlog |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 301,468 | 307,637 |
Acquisitions | 412,300 | 29,803 |
Post-Acquisition Adjustments relating to prior year acquisition | 200 |  |
Amortization | (75,375) | (39,679) |
Foreign currency translation | (9,150) | 3,707 |
Ending balance | $ 629,443 | 301,468 | 307,637
Weighted Average Amortization Period (years) | 9 years |  |
Developed Technology |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 14,462 | 14,311 |
Acquisitions | 237 | 1,685 |
Post-Acquisition Adjustments relating to prior year acquisition | (1,921) |  |
Amortization | (1,533) | (1,534) |
Foreign currency translation | 0 | 0 |
Ending balance | $ 11,245 | 14,462 | 14,311
Weighted Average Amortization Period (years) | 8 years |  |
Trade Names |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 6,699 | 4,786 |
Acquisitions | 0 | 4,417 |
Post-Acquisition Adjustments relating to prior year acquisition | (1,700) |  |
Amortization | (2,738) | (2,549) |
Foreign currency translation | (159) | 45 |
Ending balance | $ 2,102 | 6,699 | 4,786
Weighted Average Amortization Period (years) | 8 years |  |
Patents |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 10,180 | 10,027 |
Acquisitions | 0 | 0 |
Post-Acquisition Adjustments relating to prior year acquisition | 0 |  |
Amortization | (410) | (400) |
Foreign currency translation | (454) | 553 |
Ending balance | $ 9,316 | 10,180 | 10,027
Weighted Average Amortization Period (years) | 24 years |  |
Lease Intangible Assets |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 0 | 0 |
Acquisitions | 4,415 |  |
Post-Acquisition Adjustments relating to prior year acquisition | 0 |  |
Amortization | (625) |  |
Foreign currency translation | 0 |  |
Ending balance | $ 3,790 | 0 | 0
Weighted Average Amortization Period (years) | 8 years |  |
Other |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Beginning balance | $ 111 | 161 |
Acquisitions | 0 | 0 |
Post-Acquisition Adjustments relating to prior year acquisition | 0 |  |
Amortization | (50) | (50) |
Foreign currency translation | 0 | 0 |
Ending balance | $ 61 | $ 111 | $ 161
Weighted Average Amortization Period (years) | 2 years |  |

X
- 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=98514028&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=66006027&loc=d3e16323-109275 + Details
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