Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ (3,600)		$ (10,700)
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Service Cost	$ 406	$ 414	$ 1,224	$ 1,224
Cost of Goods, Total [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component		(3,000)		(9,100)
Operating Expense [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component		$ (1,500)		$ (4,200)