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Stock-Based Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2012	Jan. 31, 2011
Stock-based compensation expense recognized and estimated amount to be recognized
Stock-compensation expense recognized	$ 5,626	$ 5,373

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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