Income Taxes (Reconciliation Of The Change In Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Balance at Beginning of Year	$ 7,766	$ 8,490	$ 8,721
Additions for Tax Positions Related to Current Year	1,600	80	699
Additions for Tax Positions of Prior Years	2,751	107	45
Reductions for Tax Positions of Prior Years	(947)	(911)	(975)
Balance at End of Year	$ 11,170	$ 7,766	$ 8,490