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Stock-Based Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based expense recognized	$ 4,343	$ 3,205	$ 10,027	$ 8,831
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 1,588	$ 1,174	$ 3,666	$ 3,235

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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