Retirement Plan And Other Post-Retirement Benefits (Schedule Of Significant Unobservable Input Changes In Plan Assets) (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	$ 42,144,000	$ 43,446,000
Realized Gains/(Losses)	58,000	(69,000)
Unrealized Gains/(Losses)	2,937,000	2,430,000
Purchases	1,046,000	177,000
Sales	(89,000)	(3,840,000)
Balance, End of Year	46,096,000	42,144,000
Other Post-Retirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	2,661,000	3,985,000
Realized Gains/(Losses)	(36,000)	936,000
Unrealized Gains/(Losses)	239,000	541,000
Purchases	65,000	11,000
Sales	(20,000)	(2,812,000)
Balance, End of Year	2,909,000	2,661,000
Hedge Funds Investments [Member] | Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	42,027,000	39,956,000
Realized Gains/(Losses)	0	0
Unrealized Gains/(Losses)	3,186,000	2,071,000
Purchases	0	0
Sales	0	0
Balance, End of Year	45,213,000	42,027,000
Real Estate [Member] | Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	2,723,000	6,170,000
Realized Gains/(Losses)	62,000	(73,000)
Unrealized Gains/(Losses)	(10,000)	515,000
Purchases	1,111,000	188,000
Sales	(94,000)	(4,077,000)
Balance, End of Year	3,792,000	2,723,000
Excluding 401(h) Investments [Member] | Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	(2,606,000)	(2,680,000)
Realized Gains/(Losses)	(4,000)	4,000
Unrealized Gains/(Losses)	(239,000)	(156,000)
Purchases	(65,000)	(11,000)
Sales	5,000	237,000
Balance, End of Year	(2,909,000)	(2,606,000)
VEBA Investments [Member] | Other Post-Retirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	55,000	1,305,000
Realized Gains/(Losses)	(40,000)	940,000
Unrealized Gains/(Losses)	0	385,000
Purchases	0	0
Sales	(15,000)	(2,575,000)
Balance, End of Year	0	55,000
Including 401(h) Investments [Member] | Other Post-Retirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Balance, Beginning of Year	2,606,000	2,680,000
Realized Gains/(Losses)	4,000	(4,000)
Unrealized Gains/(Losses)	239,000	156,000
Purchases	65,000	11,000
Sales	(5,000)	(237,000)
Balance, End of Year	$ 2,909,000	$ 2,606,000