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Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Dec. 31, 2022 | Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss at beginning of period | $ (11,077) | $ (11,172) | $ (8,211) | $ (8,253) | $ (11,172) | $ (8,253)
Total other comprehensive income, before tax | 125 |  | 54 |  | 249 | 109
Total tax expense | (30) | (29) | (13) | (13) | (59) | (26)
Other comprehensive income, net of tax | 95 | 95 | 41 | 42 | 190 | 83
Accumulated other comprehensive loss at end of period | (10,982) | $ (11,077) | (8,170) | $ (8,211) | (10,982) | (8,170)
Defined Benefit Pension Plan [Member] |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |
Amortization of unrecognized net (gain) loss | 182 |  | 107 |  | 363 | 214
Postretirement Benefit Plan [Member] |  |  |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |  |  |
Amortization of unrecognized net (gain) loss | (11) |  | (7) |  | (23) | (14)
Amortization of prior service credit | $ (46) |  | $ (46) |  | $ (91) | $ (91)

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