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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, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Accumulated other comprehensive loss at beginning of period | $ (8,215) | $ (8,880) | $ (8,259) | $ (8,936)
Total other comprehensive income, before tax | 57 | 88 | 114 | 177
Total tax expense | (14) | (33) | (27) | (66)
Other comprehensive income, net of tax | 43 | 55 | 87 | 111
Accumulated other comprehensive loss at end of period | (8,172) | (8,825) | (8,172) | (8,825)
Defined Benefit Pension Plan [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amortization of unrecognized net (gain) loss | 112 | 143 | 224 | 286
Postretirement Benefit Plan [Member] |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Amortization of unrecognized net (gain) loss | (10) | (9) | (19) | (18)
Amortization of prior service credit | $ (45) | $ (46) | $ (91) | $ (91)

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