Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Oct. 31, 2011	Oct. 31, 2010
Income Tax Contingency [Line Items]
Balance at beginning of year	$ 101,681	$ 102,291
Additions for tax positions related to the current year	760	445
Reductions for tax positions related to prior years	(5,743)	(125)
Reductions for expiration of statue of limitations	(356)	(930)
Settlements	(386)
Balance as of October 31	$ 95,956	$ 101,681

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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The gross amount of decreases in unrecognized tax benefits resulting from tax positions taken in prior period tax returns, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from settlements with taxing authorities.

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The gross amount of increases in unrecognized tax benefits resulting from tax positions that have been or will be taken in the tax return for the current period, excluding amounts pertaining to examined tax returns.

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The gross amount of decreases in unrecognized tax benefits resulting from lapses of the applicable statutes of limitations.

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