Post-retirement Plan (Narrative) (Details) $ in Millions	3 Months Ended
	Sep. 30, 2018 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.75%
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 6.4