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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Acquired Intangible Assets | Goodwill and acquired intangible assets consisted of the following:
| March 30, 2019 |  | September 30, 2018
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
| (in thousands)
Goodwill (not amortized) |  |  |  |  | $ | 1,229,541 |  |  |  |  |  |  | $ | 1,182,457 |
Intangible assets with finite lives (amortized) (1): |  |  |  |  |  |  |  |  |  |  |
Purchased software | $ | 378,842 |  |  | $ | 265,881 |  |  | $ | 112,961 |  |  | $ | 362,679 |  |  | $ | 254,059 |  |  | $ | 108,620 |
Capitalized software | 22,877 |  |  | 22,877 |  |  | — |  |  | 22,877 |  |  | 22,877 |  |  | — |
Customer lists and relationships | 354,600 |  |  | 279,139 |  |  | 75,461 |  |  | 357,586 |  |  | 270,272 |  |  | 87,314 |
Trademarks and trade names | 18,994 |  |  | 15,044 |  |  | 3,950 |  |  | 19,054 |  |  | 14,786 |  |  | 4,268 |
Other | 3,952 |  |  | 3,952 |  |  | — |  |  | 4,003 |  |  | 4,003 |  |  | — |
| $ | 779,265 |  |  | $ | 586,893 |  |  | $ | 192,372 |  |  | $ | 766,199 |  |  | $ | 565,997 |  |  | $ | 200,202 |
Total goodwill and acquired intangible assets |  |  |  |  | $ | 1,421,913 |  |  |  |  |  |  | $ | 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 9 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 | 53,673 |  |  | — |  |  | 53,673 |
Foreign currency translation adjustment | (6,423 | ) |  | (166 | ) |  | (6,589 | )
Balance, March 30, 2019 | $ | 1,199,970 |  |  | $ | 29,571 |  |  | $ | 1,229,541 |
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 |  | Six months ended
| March 30, 2019 |  | March 31, 2018 |  | March 30, 2019 |  | March 31, 2018
| (in thousands)
Amortization of acquired intangible assets | $ | 5,930 |  |  | $ | 7,895 |  |  | $ | 11,866 |  |  | $ | 15,716 |
Cost of license revenue | 6,842 |  |  | 6,556 |  |  | 13,559 |  |  | 13,231 |
Total amortization expense | $ | 12,772 |  |  | $ | 14,451 |  |  | $ | 25,425 |  |  | $ | 28,947 |

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