Income Taxes (Reconciliation Of The Change In Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Balance at Beginning of Year	$ 396	$ 5,085	$ 3,147
Additions for Tax Positions of Prior Years	1,251	396	2,504
Reductions for Tax Positions of Prior Years	(396)	(1,314)	(566)
Reductions Related to Settlements with Taxing Authorities	0	(3,771)	0
Balance at End of Year	$ 1,251	$ 396	$ 5,085