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Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 29, 2019 | Jun. 29, 2019
Goodwill [Line Items] |  |
Balance, October 1, 2018 |  | $ 1,182,457
Foreign currency translation adjustment |  | (3,691)
Balance, June 29, 2019 | $ 1,245,084 | 1,245,084
Software Products |  |
Goodwill [Line Items] |  |
Balance, October 1, 2018 |  | 1,152,720
Foreign currency translation adjustment |  | (3,598)
Balance, June 29, 2019 | 1,202,795 | 1,202,795
Professional Services |  |
Goodwill [Line Items] |  |
Balance, October 1, 2018 |  | 29,737
Foreign currency translation adjustment |  | (93)
Balance, June 29, 2019 | 42,289 | 42,289
Frustum [Member] |  |
Goodwill [Line Items] |  |
Goodwill, acquired |  | 53,673
Frustum [Member] | Software Products |  |
Goodwill [Line Items] |  |
Goodwill, acquired |  | 53,673
Frustum [Member] | Professional Services |  |
Goodwill [Line Items] |  |
Goodwill, acquired |  | 0
other acquisition [Member] |  |
Goodwill [Line Items] |  |
Goodwill, acquired | $ 12,600 | 12,645
other acquisition [Member] | Software Products |  |
Goodwill [Line Items] |  |
Goodwill, acquired |  | 0
other acquisition [Member] | Professional Services |  |
Goodwill [Line Items] |  |
Goodwill, acquired |  | $ 12,645

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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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