Note 6 - Share-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
Jul. 31, 2013	Jul. 31, 2012
Note 6 - Share-Based Compensation (Details) [Line Items]
Number of Shares Counted Against the Plan's Share Reserve for Every One Share Issued in Connection with Stock Awards	1.67
Number of Shares Counted Against the Plan's Share Reserve for Each One Share Returned Or Deemed Not To Have Been Issued from the Plan	1.67
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 6.56	$ 6.26
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars)	$ 3.8	$ 6.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	482,000	1,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	500,000	400,000
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period Grant Date Fair Value (in Dollars)	3.5	2.8
Stock Issued During Period, Shares, Restricted Stock Award, Gross	400,000	500,000
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars)	6.2	5.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 14.88	$ 12.35
New Awards and Outstanding Awards Under 2012 Plan [Member] \| The 2012 Plan [Member]
Note 6 - Share-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	6,700,000
Employee Stock Option [Member]
Note 6 - Share-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	5.4
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 292 days
Restricted Stock [Member]
Note 6 - Share-Based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	$ 8.8
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 292 days
The 2012 Plan [Member]
Note 6 - Share-Based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	7,400,000

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Number of shares counted against the 2012 Plan's share reserve for each one share that is returned or deemed not to have been issued from the 2012 Plan.

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Number of shares counted against the 2012 Plan's share reserve for every one share issued in connection with an award granted on or after the effective date other than stock options and stock appreciation rights.

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Aggregate grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Number of share options (or share units) exercised during the current period.

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