Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 37,079	$ 40,745
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	168	136
Amortization of prior service credit, before tax	(45)	(45)
Total Other Comprehensive Income, Before Tax	123	91
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(39)	(31)
Amortization of prior service credit, tax	10	10
Total Tax Expense	(29)	(21)
Other Comprehensive Income, Net of Tax	94	70
Comprehensive Income	$ 37,173	$ 40,815