Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year	$ (8,253)	$ (12,070)
Net (loss) gain arising during the period	(4,029)	4,490	$ (2,662)
Total other comprehensive (loss) income, before tax	(3,809)	4,981	(2,298)
Total tax benefit (expense)	890	(1,164)	536
Other comprehensive (loss) income, net of tax	(2,919)	3,817	(1,762)
Accumulated other comprehensive loss at end of year	(11,172)	(8,253)	(12,070)
Defined Benefit Pension Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year	(9,301)
Net (loss) gain arising during the period	(4,388)	4,340
Amortization of unrecognized net loss (gain)	428	692	$ 572
Accumulated other comprehensive loss at end of year	(12,336)	(9,301)
Postretirement Benefit Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net (loss) gain arising during the period	359	150
Amortization of unrecognized net loss (gain)	(27)	(20)
Amortization of prior service credit	$ (181)	$ (181)