Accumulated Other Comprehensive Loss (Summary Of Reclassifications Out Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes		$ 76	$ 53	$ 101	$ 53
Total net of tax		(128)	(19)	(172)	(91)
Total net of tax		83	37	8	2
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net loss	[1]			273	144
Total before tax	[1]			273	144
Provision for income taxes	[1]			101	53
Total net of tax	[1]			172	91
Realized gains on available-for-sale securities into earnings	[2]			(105)	(99)
Total before tax				(105)	$ (99)
Provision for income taxes	[3]			(16)
Total net of tax				$ (89)	$ (99)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension And Postretirement Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of net loss	[1]	204	72
Total before tax	[1]	204	72
Provision for income taxes	[1]	76	53
Total net of tax	[1]	$ 128	19
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gains on available-for-sale securities into earnings	[2]		(7)
Total before tax			$ (7)
Provision for income taxes	[3]
Total net of tax			$ (7)

[1] These accumulated other comprehensive loss components are included in the computation of net periodic benefit costs (refer to Note 5 of the Notes to Consolidated Financial Statements for additional details regarding employee benefit plans).

[2] This amount is reported in Interest expense, net on the Consolidated Statements of Operations

[3] This amount is reported in Income tax expense on the Consolidated Statements of Operations