Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 40,745	$ 39,028
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	136	103
Amortization of prior service credit, before tax	(45)	(46)
Total Other Comprehensive Income, Before Tax	91	57
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(31)	(24)
Amortization of prior service credit, tax	10	11
Total Tax Expense	(21)	(13)
Other Comprehensive Income, Net of Tax	70	44
Comprehensive Income	$ 40,815	$ 39,072