Income Taxes (Schedule Of Unrecognized Tax Benefits Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Taxes [Abstract]
Balance at beginning of year	$ 1,993	$ 2,917	$ 2,775
Tax positions related to current year, gross increases	1	112	358
Tax positions related to prior periods, gross increases	88	81	65
Decreases related to lapse of statute of limitations	(789)	(1,117)	(281)
Balance at end of year	$ 1,293	$ 1,993	$ 2,917