Employee Benefit Plans (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 352	$ 392
Expected return on plan assets	(388)	(373)
Amortization of net gain (loss)	190	141
Net periodic benefit cost	154	160
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	16	15
Interest cost	9	10
Amortization of net gain (loss)		(4)
Net periodic benefit cost	$ 25	$ 21