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Acquisitions - Additional Information (Details) $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Nov. 01, 2019 USD ($) | Nov. 19, 2018 USD ($) Employee | Jun. 27, 2020 USD ($) | Jun. 29, 2019 USD ($) | Jun. 27, 2020 USD ($) | Jun. 29, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, acquisition related costs |  |  | $ 700 | $ 400 | $ 8,100 | $ 1,200
Onshape |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, consideration transferred | $ 469,000 |  |  |  |  |
Goodwill, acquired | 364,900 |  |  |  | $ 364,910 |
Liabilities | 4,100 |  |  |  |  |
Onshape | Customer Lists and Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible assets acquired | 56,800 |  |  |  |  |
Onshape | Purchased Software |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible assets acquired | 47,300 |  |  |  |  |
Onshape | Trademarks |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible assets acquired | $ 3,600 |  |  |  |  |
Onshape | Maximum | Customer Lists and Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life | 10 years |  |  |  |  |
Onshape | Maximum | Purchased Software |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life | 16 years |  |  |  |  |
Onshape | Maximum | Trademarks |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life | 15 years |  |  |  |  |
Frustum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business combination, consideration transferred |  | $ 69,500 |  |  |  |
Goodwill, acquired |  | 53,700 |  |  |  |
Liabilities |  | $ 2,100 |  |  |  |
Acquired finite-lived intangible asset, weighted average useful life |  | 15 years |  |  |  |
Cash acquired from acquisition |  | $ 700 |  |  |  |
Entity number of employees | Employee |  | 12 |  |  |  |
Frustum | Purchased Software |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite-lived intangible assets acquired |  | $ 17,900 |  |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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