Employee Benefit Plans (Schedule Of Net Periodic Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 364	$ 375	$ 728	$ 750
Expected return on plan assets	(396)	(377)	(792)	(754)
Amortization of net gain (loss)	84	49	168	97
Net periodic benefit cost	52	47	104	93
Other Postretirement Benefit Plans Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	12	16	25	31
Interest cost	8	12	16	25
Amortization of net gain (loss)	(12)	(3)	(24)	(6)
Net periodic benefit cost	$ 8	$ 25	$ 17	$ 50