Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Deferred tax assets, Employee medical and other benefits	$ 10,349	$ 12,533
Deferred tax assets, Receivable and other allowances	5,314	5,626
Deferred tax assets, Inventories	1,041	1,034
Deferred tax assets, Other accrued liabilities	1,905	1,740
Total deferred tax assets	18,609	20,933
Deferred tax liabilities, Property, plant and equipment	(22,188)	(21,573)
Deferred tax liabilities, Intangible assets	(14,070)	(14,555)
Deferred tax liabilities, Goodwill	(7,092)	(6,117)
Deferred tax liabilities, Other	(466)	(121)
Total deferred tax liabilities	(43,816)	(42,366)
Net deferred tax liability	$ (25,207)	$ (21,433)