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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Dec. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Acquired Intangible Assets | Goodwill and acquired intangible assets consisted of the following:
| December 29, 2018 |  | September 30, 2018
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
| (in thousands)
Goodwill (not amortized) |  |  |  |  | $ | 1,230,901 |  |  |  |  |  |  | $ | 1,182,457 |
Intangible assets with finite lives (amortized) (1): |  |  |  |  |  |  |  |  |  |  |
Purchased software | $ | 379,653 |  |  | $ | 259,850 |  |  | $ | 119,803 |  |  | $ | 362,679 |  |  | $ | 254,059 |  |  | $ | 108,620 |
Capitalized software | 22,877 |  |  | 22,877 |  |  | — |  |  | 22,877 |  |  | 22,877 |  |  | — |
Customer lists and relationships | 355,412 |  |  | 274,239 |  |  | 81,173 |  |  | 357,586 |  |  | 270,272 |  |  | 87,314 |
Trademarks and trade names | 18,987 |  |  | 14,879 |  |  | 4,108 |  |  | 19,054 |  |  | 14,786 |  |  | 4,268 |
Other | 3,981 |  |  | 3,981 |  |  | — |  |  | 4,003 |  |  | 4,003 |  |  | — |
| $ | 780,910 |  |  | $ | 575,826 |  |  | $ | 205,084 |  |  | $ | 766,199 |  |  | $ | 565,997 |  |  | $ | 200,202 |
Total goodwill and acquired intangible assets |  |  |  |  | $ | 1,435,985 |  |  |  |  |  |  | $ | 1,382,659 |
(1) The weighted-average useful lives of purchased software, customer lists and relationships, and trademarks and trade names with a remaining net book value are 10 years, 10 years, and 11 years, respectively.
Schedule of Goodwill | Changes in goodwill presented by reportable segments were as follows:
| Software Products |  | Professional Services |  | Total
| (in thousands)
Balance, October 1, 2018 | $ | 1,152,720 |  |  | $ | 29,737 |  |  | $ | 1,182,457 |
Frustum acquisition | 53,777 |  |  | — |  |  | 53,777 |
Foreign currency translation adjustment | (5,199 | ) |  | (134 | ) |  | (5,333 | )
Balance, December 29, 2018 | $ | 1,201,298 |  |  | $ | 29,603 |  |  | $ | 1,230,901 |
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
| December 29, 2018 |  | December 30, 2017
| (in thousands)
Amortization of acquired intangible assets | $ | 5,936 |  |  | $ | 7,821 |
Cost of license revenue | 6,717 |  |  | 6,675 |
Total amortization expense | $ | 12,653 |  |  | $ | 14,496 |

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