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Business Combinations - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 30, 2020 | Apr. 30, 2020 | Oct. 31, 2019 | [1]
Business Acquisition [Line Items] |  |  |
Goodwill | $ 3,311,243 | $ 3,311,243 | $ 3,171,179
Design service arrangement | $ 10,700 | 10,700 |
Design service arrangement amortization period | 5 years |  |
Semiconductor & System Design: |  |  |
Business Acquisition [Line Items] |  |  |
Consideration transfered | $ 105,700 |  |
Consideration transfered, cash | 75,700 |  |
Consideration transfered, fair value of company product | 30,000 |  |
Identifiable intangibles assets acquired | 20,600 | 20,600 |
Tangibles assets acquired | 4,200 | 4,200 |
Goodwill | 80,900 | 80,900 |
Several other acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Consideration transfered |  | 79,800 |
Identifiable intangibles assets acquired | 25,200 | 25,200 |
Goodwill | 55,900 | 55,900 |
Several other acquisitions | Software Integrity |  |  |
Business Acquisition [Line Items] |  |  |
Goodwill | $ 12,900 | $ 12,900 |
[1] | Derived from audited financial statements.

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