Subsequent Events (Schedule Of Restricted Units Granted) (Details) (USD $)	12 Months Ended
	Sep. 30, 2011
Performance-Based Restricted Stock Units [Member]
Subsequent Event [Line Items]
Number Granted	786
Intrinsic Value	$ 15,376
Time-Based Restricted Stock Units [Member]
Subsequent Event [Line Items]
Number Granted	1,110
Intrinsic Value	$ 21,993