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Short-Term and Long-Term Investments - Components of Investments (Details) - USD ($) $ in Thousands | May 01, 2021 | Oct. 31, 2020
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 243,459 |
Estimated Fair Value | 243,531 |
U.S. government obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 243,459 | $ 232,811
Gross Unrealized Gains | 74 | 109
Gross Unrealized Losses | (2) | (27)
Estimated Fair Value | 243,531 | 232,893
Included in short-term investments | U.S. government obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 151,764 | 150,559
Gross Unrealized Gains | 52 | 109
Gross Unrealized Losses | 0 | (1)
Estimated Fair Value | 151,816 | 150,667
Included in long-term investments | U.S. government obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 91,695 | 82,252
Gross Unrealized Gains | 22 | 0
Gross Unrealized Losses | (2) | (26)
Estimated Fair Value | $ 91,715 | $ 82,226

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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