Income Taxes (Details Textual) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014	Oct. 31, 2014
Income Taxes (Textual) [Abstract]
Income Tax Expense (Benefit)	$ 18,602,000us-gaap_IncomeTaxExpenseBenefit	$ 28,262,000us-gaap_IncomeTaxExpenseBenefit	$ 61,300,000us-gaap_IncomeTaxExpenseBenefit	$ 53,917,000us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate Reconciliation, Percent	21.50%	30.20%	29.10%	32.70%
Number of states	19		19
Unrecognized Tax Benefits	45,600,000us-gaap_UnrecognizedTaxBenefits		45,600,000us-gaap_UnrecognizedTaxBenefits
Decrease in Unrecognized Tax Benefits is Reasonably Possible	10,800,000		10,800,000
State and Local Jurisdiction [Member]
Income Taxes (Textual) [Abstract]
Effective Income Tax Rate Reconciliation, Percent			6.70%		7.20%
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	13,700,000		13,700,000
Deferred Tax Assets, Valuation Allowance	$ 42,500,000		$ 42,500,000		$ 43,800,000

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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