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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Apr. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill | Goodwill as of April 30, 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 | 5,485 |
As of April 30, 2018 | $ | 3,147,124 |
Summary of Intangible Assets | Intangible assets as of April 30, 2018 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 767,764 |  |  | $ | 563,097 |  |  | $ | 204,667 |
Customer relationships | 358,090 |  |  | 185,128 |  |  | 172,962 |
Contract rights intangible | 184,180 |  |  | 174,861 |  |  | 9,319 |
Trademarks and trade names | 42,929 |  |  | 19,599 |  |  | 23,330 |
In-process research and development (IPR&D)(1) | 8,200 |  |  | — |  |  | 8,200 |
Capitalized software development costs | 34,628 |  |  | 30,911 |  |  | 3,717 |
Total | $ | 1,395,791 |  |  | $ | 973,596 |  |  | $ | 422,195 |
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 April 30, |  | Six Months Ended April 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (in thousands)
Core/developed technology | $ | 18,985 |  |  | $ | 16,471 |  |  | $ | 37,053 |  |  | $ | 34,754 |
Customer relationships | 9,656 |  |  | 6,844 |  |  | 18,219 |  |  | 13,736 |
Contract rights intangible | 1,372 |  |  | 3,286 |  |  | 2,262 |  |  | 6,677 |
Trademarks and trade names | 1,172 |  |  | 896 |  |  | 2,198 |  |  | 1,838 |
Capitalized software development costs | 897 |  |  | 989 |  |  | 1,817 |  |  | 1,966 |
Total | $ | 32,082 |  |  | $ | 28,486 |  |  | $ | 61,549 |  |  | $ | 58,971 |
Estimated Future Amortization of Intangible Assets | The following table presents the estimated future amortization of the existing intangible assets as of April 30, 2018:
Fiscal Year | (in thousands)
Remainder of fiscal 2018 | $ | 61,217 |
2019 | 100,646 |
2020 | 76,226 |
2021 | 54,693 |
2022 | 43,227 |
2023 and thereafter | 77,986 |
IPR&D(1) | 8,200 |
Total | $ | 422,195 |
(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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