Income Taxes (Schedule Of Components Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Income Taxes [Abstract]
Current, U.S. federal	$ (2,322)	$ 2,407	$ 5,581
Current, state and local	152	405	591
Current, foreign	2,355	2,708	1,858
Current tax provision	185	5,520	8,030
Deferred, U.S. federal	8,961	990	(22,261)
Deferred, state and local	770	68	(1,320)
Deferred, foreign	(17)	(305)	(249)
Deferred tax provision	9,714	753	(23,830)
Income tax provision	$ 9,899	$ 6,273	$ (15,800)