Accumulated Other Comprehensive Loss (Summary Of Reclassifications Out Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes		$ 71	$ 25
Total net of tax		(119)	(44)
Total net of tax			(75)
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]	190	69
Total before tax	[1]	190	69
Provision for income taxes	[1]	71	25
Total net of tax	[1]	119	44
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]		(105)
Total before tax			(105)
Provision for income taxes	[3]		(16)
Total net of tax			$ (89)

[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 (Benefit) on the Consolidated Statements of Operations