Employee Benefit Plans (Schedule Of Amounts Recognized In Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net (gain) loss	$ 3,845	$ 1,894	$ 5,848
Amortization of net gain (loss)	(562)	(464)	(194)
Total recognized in other comprehensive income (loss)	3,283	1,430	5,654
Total recognized in net periodic benefit cost and other comprehensive income (loss)	3,922	1,864	5,840
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net (gain) loss	160	(348)	150
Amortization of net gain (loss)	15	48	11
Total recognized in other comprehensive income (loss)	175	(300)	161
Total recognized in net periodic benefit cost and other comprehensive income (loss)	$ 258	$ (265)	$ 263