Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2019		Jun. 30, 2018		Jun. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year		$ (8,259)		$ (8,936)
Net (loss) gain arising during the period		(2,902)		3,041		$ 3,334
Total other comprehensive (loss) income, before tax		(2,674)		3,395		3,829
Total tax benefit (expense)		625		(829)		(1,415)
Other comprehensive (loss) income, net of tax		(2,049)		2,566		2,414
Tax Cuts and Jobs Act of 2017, Reclassification from accumulated other comprehensive loss to retained earnings		0		(1,889)
Accumulated other comprehensive loss at end of year		(10,308)		(8,259)		(8,936)
Defined Benefit Pension Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year		(9,825)
Net (loss) gain arising during the period		(2,771)		2,987
Amortization of unrecognized net loss (gain)		447	[1]	572	[1]	$ 715
Accumulated other comprehensive loss at end of year		(11,606)		(9,825)
Postretirement Benefit Plan [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net (loss) gain arising during the period	[2]	(131)		54
Amortization of unrecognized net loss (gain)	[2]	(37)		(36)
Amortization of prior service credit	[2]	$ (182)		$ (182)

[1] Included in the computation of net periodic benefit income/cost. See Note 12 for additional information.

[2] Additional disclosures for postretirement benefits are not included as they are not considered material.