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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Apr. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Goodwill | Goodwill as of April 30, 2017 and October 31, 2016 consisted of the following:
| (in thousands)
As of October 31, 2016 | $ | 2,518,245 |
Additions | 132,908 |
Effect of foreign currency translation | 10,385 |
As of April 30, 2017 | $ | 2,661,538 |
Summary of Intangible Assets | Intangible assets as of April 30, 2017 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 622,979 |  |  | $ | 495,488 |  |  | $ | 127,491 |
Customer relationships | 276,756 |  |  | 153,598 |  |  | 123,158 |
Contract rights intangible | 173,589 |  |  | 168,332 |  |  | 5,257 |
Trademarks and trade names | 25,129 |  |  | 15,659 |  |  | 9,470 |
In-process research and development (IPR&D)(1) | 4,600 |  |  | — |  |  | 4,600 |
Capitalized software development costs | 31,708 |  |  | 27,075 |  |  | 4,633 |
Total | $ | 1,134,761 |  |  | $ | 860,152 |  |  | $ | 274,609 |
(1) | IPR&D is reclassified to core/developed technology upon completion or is written off upon abandonment.
Intangible assets as of October 31, 2016 consisted of the following:
| Gross Assets |  | Accumulated Amortization |  | Net Assets
| (in thousands)
Core/developed technology | $ | 610,812 |  |  | $ | 460,722 |  |  | $ | 150,090 |
Customer relationships | 235,997 |  |  | 139,932 |  |  | 96,065 |
Contract rights intangible | 171,248 |  |  | 162,183 |  |  | 9,065 |
Trademarks and trade names | 20,729 |  |  | 13,821 |  |  | 6,908 |
Capitalized software development costs | 29,642 |  |  | 25,109 |  |  | 4,533 |
Total | $ | 1,068,428 |  |  | $ | 801,767 |  |  | $ | 266,661 |
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,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in thousands)
Core/developed technology | $ | 16,471 |  |  | $ | 21,607 |  |  | $ | 34,754 |  |  | $ | 43,863 |
Customer relationships | 6,844 |  |  | 6,295 |  |  | 13,736 |  |  | 12,488 |
Contract rights intangible | 3,286 |  |  | 2,885 |  |  | 6,677 |  |  | 11,106 |
Trademarks and trade names | 896 |  |  | 792 |  |  | 1,838 |  |  | 1,583 |
Capitalized software development costs(2) | 989 |  |  | 921 |  |  | 1,966 |  |  | 1,836 |
Total | $ | 28,486 |  |  | $ | 32,500 |  |  | $ | 58,971 |  |  | $ | 70,876 |
(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:
Fiscal Year | (in thousands)
Remainder of fiscal 2017 | $ | 51,862 |
2018 | 82,127 |
2019 | 56,945 |
2020 | 39,483 |
2021 | 21,343 |
2022 and thereafter | 18,249 |
IPR&D(3) | 4,600 |
Total | $ | 274,609 |
(3) IPR&D assets are amortized over their useful lives upon completion or written off upon abandonment.

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