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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Jan. 02, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | Changes in goodwill presented by reportable segment were as follows:
| Software Products Segment |  | Services Segment |  | Total
| (in thousands)
Balance, October 1, 2015 | $ | 1,016,413 |  |  | $ | 52,628 |  |  | $ | 1,069,041 |
Acquisition of Vuforia | 23,316 |  |  | — |  |  | 23,316 |
Foreign currency translation adjustments | (6,082 | ) |  | (45 | ) |  | (6,127 | )
Balance, January 2, 2016 | $ | 1,033,647 |  |  | $ | 52,583 |  |  | $ | 1,086,230 |
Goodwill and Acquired Intangible Assets | Goodwill and acquired intangible assets consisted of the following:
| January 2, 2016 |  | September 30, 2015
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
| (in thousands)
Goodwill (not amortized) |  |  |  |  | $ | 1,086,230 |  |  |  |  |  |  | $ | 1,069,041 |
Intangible assets with finite lives (amortized) (1): |  |  |  |  |  |  |  |  |  |  |
Purchased software | $ | 323,762 |  |  | $ | 178,483 |  |  | $ | 145,279 |  |  | $ | 284,257 |  |  | $ | 174,887 |  |  | $ | 109,370 |
Capitalized software | 22,877 |  |  | 22,877 |  |  | — |  |  | 22,877 |  |  | 22,877 |  |  | — |
Customer lists and relationships | 347,011 |  |  | 180,417 |  |  | 166,594 |  |  | 349,938 |  |  | 174,017 |  |  | 175,921 |
Trademarks and trade names | 18,432 |  |  | 12,814 |  |  | 5,618 |  |  | 18,534 |  |  | 12,759 |  |  | 5,775 |
Other | 3,905 |  |  | 3,726 |  |  | 179 |  |  | 3,946 |  |  | 3,711 |  |  | 235 |
| $ | 715,987 |  |  | $ | 398,317 |  |  | $ | 317,670 |  |  | $ | 679,552 |  |  | $ | 388,251 |  |  | $ | 291,301 |
Total goodwill and acquired intangible assets |  |  |  |  | $ | 1,403,900 |  |  |  |  |  |  | $ | 1,360,342 |
(1) The weighted average useful lives of purchased software, customer lists and relationships, trademarks and trade names and other intangible assets with a remaining net book value are 8 years, 10 years, 10 years, and 3 years, respectively.
Amortization of Intangible Assets | The aggregate amortization expense for intangible assets with finite lives was classified in our Consolidated Statements of Operations as follows:
| Three months ended |
| January 2, 2016 |  | January 3, 2015 |
| (in thousands)
Amortization of acquired intangible assets | $ | 8,350 |  |  | $ | 9,413 |  |
Cost of software revenue | 5,127 |  |  | 4,767 |  |
Total amortization expense | $ | 13,477 |  |  | $ | 14,180 |  |

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