Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Deferred tax assets, Employee medical and other benefits	$ 6,853	$ 8,384
Deferred tax assets, Operating lease liabilities	5,181	5,713
Deferred tax assets, Inventories	3,003	2,382
Deferred tax assets, Receivables	2,175	2,371
Deferred tax assets, Other accrued liabilities	1,719	1,938
Total deferred tax assets	18,931	20,788
Deferred tax liabilities, Property, plant and equipment	(31,052)	(30,036)
Deferred tax liabilities, Goodwill	(14,174)	(11,390)
Deferred tax liabilities, Intangible assets	(7,076)	(7,848)
Deferred tax liabilities, Operating lease right-of-use assets	(5,298)	(5,333)
Deferred tax liabilities, Other	(33)	(421)
Total deferred tax liabilities	(57,633)	(55,028)
Net deferred tax liability	$ (38,702)	$ (34,240)