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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
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)