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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Apr. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Intangible Assets | Intangible assets as of April 30, 2019 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 773,147 |  |  | $ | 629,360 |  |  | $ | 143,787 |
Customer relationships | 358,522 |  |  | 223,374 |  |  | 135,148 |
Contract rights intangible | 183,947 |  |  | 179,167 |  |  | 4,780 |
Trademarks and trade names | 42,929 |  |  | 24,025 |  |  | 18,904 |
In-process research and development (IPR&D)(1) | 1,200 |  |  | — |  |  | 1,200 |
Capitalized software development costs | 37,309 |  |  | 34,201 |  |  | 3,108 |
Total | $ | 1,397,054 |  |  | $ | 1,090,127 |  |  | $ | 306,927 |
(1) | IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.
Intangible assets as of October 31, 2018 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 773,147 |  |  | $ | 598,956 |  |  | $ | 174,191 |
Customer relationships | 358,524 |  |  | 204,382 |  |  | 154,142 |
Contract rights intangible | 183,953 |  |  | 177,191 |  |  | 6,762 |
Trademarks and trade names | 42,929 |  |  | 21,944 |  |  | 20,985 |
In-process research and development (IPR&D)(1) | 1,200 |  |  | — |  |  | 1,200 |
Capitalized software development costs | 35,818 |  |  | 32,694 |  |  | 3,124 |
Total | $ | 1,395,571 |  |  | $ | 1,035,167 |  |  | $ | 360,404 |
Amortization Expense Related to Intangible Assets | Amortization expense related to intangible assets consisted of the following:
| Three Months Ended April 30, |  | Six Months Ended April 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
| (in thousands)
Core/developed technology | $ | 14,045 |  |  | $ | 18,985 |  |  | $ | 30,404 |  |  | $ | 37,053 |
Customer relationships | 9,377 |  |  | 9,656 |  |  | 18,957 |  |  | 18,219 |
Contract rights intangible | 866 |  |  | 1,372 |  |  | 1,982 |  |  | 2,262 |
Trademarks and trade names | 909 |  |  | 1,172 |  |  | 2,081 |  |  | 2,198 |
Capitalized software development costs(2) | 735 |  |  | 897 |  |  | 1,507 |  |  | 1,817 |
Total | $ | 25,932 |  |  | $ | 32,082 |  |  | $ | 54,931 |  |  | $ | 61,549 |
(2) Amortization of capitalized software development costs is included in cost of products revenue in the unaudited condensed consolidated statements of operations.
Estimated Future Amortization of Intangible Assets | The following table presents the estimated future amortization of the existing intangible assets as of April 30, 2019:
Fiscal Year | (in thousands)
Remainder of fiscal 2019 | $ | 48,131 |
2020 | 78,806 |
2021 | 56,118 |
2022 | 44,006 |
2023 | 29,219 |
2024 and thereafter | 49,447 |
IPR&D(3) | 1,200 |
Total | $ | 306,927 |
(3) IPR&D assets are amortized over their useful lives upon completion or are written off upon abandonment.

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