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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
Sep. 30, 2024
Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Accumulated other comprehensive loss at beginning of period $ (8,640) $ (9,365)
Total other comprehensive income, before tax 87 99
Total tax expense (20) (23)
Other comprehensive income, net of tax 67 76
Accumulated other comprehensive loss at end of period (8,573) (9,289)
Defined Benefit Pension Plan [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of unrecognized net (gain) loss 147 159
Postretirement Benefit Plan [Member]    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Amortization of unrecognized net (gain) loss (15) (15)
Amortization of prior service credit $ (45) $ (45)