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Stock Compensation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Compensation costs included in net income
Gross compensation costs	$ 1,725	$ 1,480	$ 3,238	$ 10,028
Income tax benefits	(570)	(479)	(1,016)	(3,453)
Net compensation expense	$ 1,155	$ 1,001	$ 2,222	$ 6,575

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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