Short-Term and Long-Term Investments - Components of Investments (Details) - USD ($) $ in Thousands	Jan. 30, 2021	Oct. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 253,780
Estimated Fair Value	253,798
U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	253,780	$ 232,811
Gross Unrealized Gains	18	109
Gross Unrealized Losses	0	(27)
Estimated Fair Value	253,798	232,893
Included in short-term investments | U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	151,420	150,559
Gross Unrealized Gains	14	109
Gross Unrealized Losses	0	(1)
Estimated Fair Value	151,434	150,667
Included in long-term investments | U.S. government obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	102,360	82,252
Gross Unrealized Gains	4	0
Gross Unrealized Losses	0	(26)
Estimated Fair Value	$ 102,364	$ 82,226