Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 39,028	$ 29,386
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	103	134
Amortization of prior service credit, before tax	(46)	(45)
Total Other Comprehensive Income, Before Tax	57	89
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(24)	(49)
Amortization of prior service credit, tax	11	16
Total Tax Expense	(13)	(33)
Other Comprehensive Income, Net of Tax	44	56
Comprehensive Income	$ 39,072	$ 29,442