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Goodwill and Intangible Assets (Tables) | 9 Months Ended
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Jul. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill | Goodwill as of July 31, 2018 and October 31, 2017 consisted of the following:
| (in thousands)
As of October 31, 2017 | $ | 2,706,974 |
Additions | 434,741 |
Adjustments | (76 | )
Effect of foreign currency translation | (2,973 | )
As of July 31, 2018 | $ | 3,138,666 |
Summary of Intangible Assets | Intangible assets as of July 31, 2018 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 772,014 |  |  | $ | 581,789 |  |  | $ | 190,225 |
Customer relationships | 358,022 |  |  | 194,758 |  |  | 163,264 |
Contract rights intangible | 184,006 |  |  | 176,045 |  |  | 7,961 |
Trademarks and trade names | 42,929 |  |  | 20,771 |  |  | 22,158 |
In-process research and development (IPR&D)(1) | 7,100 |  |  | — |  |  | 7,100 |
Capitalized software development costs | 35,582 |  |  | 31,805 |  |  | 3,777 |
Total | $ | 1,399,653 |  |  | $ | 1,005,168 |  |  | $ | 394,485 |
Intangible assets as of October 31, 2017 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 647,975 |  |  | $ | 526,796 |  |  | $ | 121,179 |
Customer relationships | 278,811 |  |  | 166,886 |  |  | 111,925 |
Contract rights intangible | 174,615 |  |  | 172,178 |  |  | 2,437 |
Trademarks and trade names | 25,329 |  |  | 17,401 |  |  | 7,928 |
In-process research and development (IPR&D)(1) | 6,600 |  |  | — |  |  | 6,600 |
Capitalized software development costs | 32,868 |  |  | 29,094 |  |  | 3,774 |
Total | $ | 1,166,198 |  |  | $ | 912,355 |  |  | $ | 253,843 |
Amortization Expense Related to Intangible Assets | Amortization expense related to intangible assets consisted of the following:
| Three Months Ended July 31, |  | Nine Months Ended July 31,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (in thousands)
Core/developed technology | $ | 18,692 |  |  | $ | 15,575 |  |  | $ | 55,745 |  |  | $ | 50,330 |
Customer relationships | 9,584 |  |  | 6,834 |  |  | 27,803 |  |  | 20,569 |
Contract rights intangible | 1,357 |  |  | 3,215 |  |  | 3,619 |  |  | 9,893 |
Trademarks and trade names | 1,172 |  |  | 896 |  |  | 3,371 |  |  | 2,734 |
Capitalized software development costs | 894 |  |  | 1,002 |  |  | 2,710 |  |  | 2,968 |
Total | $ | 31,699 |  |  | $ | 27,522 |  |  | $ | 93,248 |  |  | $ | 86,494 |
Estimated Future Amortization of Intangible Assets | The following table presents the estimated future amortization of the existing intangible assets as of July 31, 2018:
Fiscal Year | (in thousands)
Remainder of fiscal 2018 | $ | 29,972 |
2019 | 102,027 |
2020 | 77,490 |
2021 | 55,511 |
2022 | 43,938 |
2023 and thereafter | 78,447 |
IPR&D(1) | 7,100 |
Total | $ | 394,485 |
(1) | IPR&D assets are reclassified to core/developed technology and are amortized over their useful lives upon completion or written off upon abandonment.

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