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Stock-Based Benefit Plans (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012	Dec. 14, 2012	Oct. 31, 2012	Dec. 20, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based expense recognized	$ 4,343	$ 3,205	$ 10,027	$ 8,831
Non-Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units issued			94,080	107,820
Closing Price of Company Common Stock at Issuance Date					$ 32.22		$ 20.50
Fair value of restricted stock units issued			3,031	2,210
Stock based expense recognized	472	311	1,584	625
Summary of aggregate number and unamortized value of outstanding stock price based RSUs
Aggregate outstanding RSUs	228,490		228,490			137,764
Unamortized value of RSUs	$ 2,692		$ 2,692			$ 1,326

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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