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Share-Based Compensation (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012 Y	Mar. 31, 2011
Share Based Compensation (Textual) [Abstract]
Allocated Share-Based Compensation Expense	$ 19,271	$ 19,639	$ 53,626	$ 53,720
Unrecognized compensation expense for all non-vested share-based awards	$ 132,169		$ 132,169
Weighted-average remaining life non-vested share-based awards			2.3

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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