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Stock-Based Benefit Plans (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011	Oct. 31, 2011
Stock Price-Based RSUs issued
RSU expense recognized	$ 3,205	$ 2,345	$ 8,831	$ 7,717
Aggregate outstanding RSUs	706,000		706,000		706,000
Stock Price Based Restricted Stock Units [Member]
Stock Price-Based RSUs issued
RSU expense recognized	679	983	1,528	1,735
Unamortized value of performance-based RSUs	$ 3,401		$ 3,401		4,929

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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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