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Income Taxes - Rate Reconciliation Between Provision for Income Taxes and Taxes Computed at Statutory Federal Rate (Detail) - USD ($) $ in Thousands		12 Months Ended
		Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Income Tax Disclosure [Abstract]
Statutory federal tax		$ 98,564	$ 95,251	$ 96,483
State tax (benefit), net of federal effect		(4,764)	(4,306)	(2,697)
Tax credits	[1]	(13,301)	(5,153)	(24,972)
Tax on foreign earnings less than U.S. statutory tax		(56,536)	(61,376)	(40,156)
Deferred tax reversal resulting from merger of foreign affiliate		0	0	(6,808)
Tax settlements		(6,251)	(19,645)	(1,130)
Stock based compensation		5,406	5,675	4,671
Changes in valuation allowance		(216)	(235)	(776)
Federal statute lapses		(2,265)	(6,746)	0
Integration of acquired technologies		33,015	4,715	3,486
Other		2,024	4,838	(235)
Provision (Benefit) for income taxes		55,676	13,018	$ 27,866
Federal research and development tax credit		$ 12,400	$ 19,000
Federal research and development tax credit, expiry date			Dec. 31, 2013
[1] As a result of the reinstatement of the U.S. federal research tax credit in fiscal 2013, the Company reflected a tax benefit of approximately $19.0 million in the above amount for the period January 1, 2012 through October 31, 2013. The credit expired on December 31, 2013, resulting in only two months of credit for fiscal 2014. The credit was reinstated in fiscal 2015, resulting in a tax benefit of approximately $12.4 million in the above amount for the period January 1 through December 31, 2014.

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