Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2018	Oct. 31, 2017
Deferred tax assets:
Accruals and reserves	$ 17,766	$ 36,906
Deferred revenue	37,072	42,420
Deferred compensation	50,096	67,145
Intangible and depreciable assets	185,940	51,679
Capitalized research and development costs	4,817	12,508
Stock-based compensation	19,825	23,679
Tax loss carryovers	37,029	23,623
Foreign tax credit carryovers	64,803	7,662
Research and other tax credit carryovers	250,069	157,817
Other	4,480	0
Gross deferred tax assets	671,897	423,439
Valuation allowance	(201,258)	(121,770)
Total deferred tax assets	470,639	301,669
Deferred tax liabilities:
Intangible assets	72,682	62,299
Undistributed earnings of foreign subsidiaries	523	1,300
Other	0	1,758
Total deferred tax liabilities	73,205	65,357
Net deferred tax assets	$ 397,434	$ 236,312