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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Jan. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill | Goodwill as of January 31, 2018 and October 31, 2017 consisted of the following:
| (in thousands)
As of October 31, 2017 | $ | 2,706,974 |
Additions | 412,857 |
Adjustments | (81 | )
Effect of foreign currency translation | 10,848 |
As of January 31, 2018 | $ | 3,130,598 |
Summary of Intangible Assets | Intangible assets as of January 31, 2018 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 749,186 |  |  | $ | 544,173 |  |  | $ | 205,013 |
Customer relationships | 354,091 |  |  | 175,383 |  |  | 178,708 |
Contract rights intangible | 183,478 |  |  | 173,524 |  |  | 9,954 |
Trademarks and trade names | 42,929 |  |  | 18,426 |  |  | 24,503 |
In-process research and development (IPR&D)(1) | 12,700 |  |  | — |  |  | 12,700 |
Capitalized software development costs | 33,675 |  |  | 30,014 |  |  | 3,661 |
Total | $ | 1,376,059 |  |  | $ | 941,520 |  |  | $ | 434,539 |
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 January 31,
| 2018 |  | 2017
| (in thousands)
Core/developed technology | $ | 18,068 |  |  | $ | 18,283 |
Customer relationships | 8,563 |  |  | 6,892 |
Contract rights intangible | 890 |  |  | 3,392 |
Trademarks and trade names | 1,026 |  |  | 941 |
Capitalized software development costs(2) | 920 |  |  | 977 |
Total | $ | 29,467 |  |  | $ | 30,485 |
Estimated Future Amortization of Intangible Assets | The following table presents the estimated future amortization of the existing intangible assets:
Fiscal Year | (in thousands)
Remainder of fiscal 2018 | $ | 89,444 |
2019 | 95,968 |
2020 | 71,919 |
2021 | 50,591 |
2022 | 40,305 |
2023 and thereafter | 79,712 |
IPR&D(1) | 6,600 |
Total | $ | 434,539 |
(1) IPR&D assets are reclassified to core/developed technology and are amortized over their useful lives upon completion or written off upon abandonment. (2) Amortization of capitalized software development costs is included in cost of products revenue in the unaudited condensed consolidated statements of operations.

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