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Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Accumulated other comprehensive loss at beginning of year | $ (9,365) | $ (11,172) |
Net gain arising during the period | 554 | 1,859 | $ (4,029)
Total other comprehensive income, before tax | 946 | 2,357 | (3,809)
Total tax expense | (221) | (550) | 890
Other comprehensive income, net of tax | 725 | 1,807 | (2,919)
Accumulated other comprehensive loss at end of year | (8,640) | (9,365) | (11,172)
Defined Benefit Pension Plans [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Accumulated other comprehensive loss at beginning of year | (10,610) |  |
Net gain arising during the period | 500 | 1,527 |
Amortization of unrecognized net loss (gain) | 633 | 725 | $ 428
Accumulated other comprehensive loss at end of year | (9,742) | (10,610) |
Postretirement Benefit Plan [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Net gain arising during the period | 54 | 332 |
Amortization of unrecognized net loss (gain) | (60) | (46) |
Amortization of prior service credit | $ (181) | $ (181) |

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