Employee Benefit Costs (Schedule of Accumulated Other Comprehensive Income That Are Expected To Be Recognized As Components Of Net Periodic (Income) Expense During The Next Fiscal Year) (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Pension Benefits [Member]
Prior Service Cost (Credit)	$ (78)
Net Actuarial Loss	(15,904)
Other Postretirement Benefits [Member]
Prior Service Cost (Credit)	0
Net Actuarial Loss	$ (2,998)