Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2008
Deferred tax assets:
Reserves and accrued liabilities	$ 30,637	$ 30,889
Depreciation and amortization	259,899	186,716
NOL and credit carry forward	1,154,571	1,107,059
Other	22,304	38,829
Gross deferred tax assets	1,467,411	1,363,493
Valuation allowance	(1,467,411)	(1,363,493)	(1,198,067)	(1,164,384)
Net deferred tax asset	$ 0	$ 0

The sum of the tax effects as of the balance sheet date of the amounts of all future tax deductions arising from temporary differences between tax basis and generally accepted accounting principles basis recognition of assets, liabilities, revenues and expenses, which can only be deducted for tax purposes when permitted under enacted tax laws ( before the valuation allowance, if any, to reduce such sum amount to net realizable value). Includes any tax benefit realized in deferred tax assets for significant impacts of tax planning strategies.

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The tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from other temporary differences not otherwise specified in the taxonomy.

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- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from other provisions, reserves, allowances, and liabilities, which are not otherwise reflected in deferred taxes in the taxonomy, which can only be deducted for tax purposes when relevant losses are realized or actual obligations are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from all currently nondeductible expenses reflected in all reserves and accrued liabilities, which can only be deducted for tax purposes when relevant losses are realized or relevant obligations are actually incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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- Definition

The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income.

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