Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 44,630	$ 43,424	$ 81,709	$ 84,169
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	168	137	336	273
Amortization of prior service credit, before tax	(46)	(46)	(91)	(91)
Total Other Comprehensive Income, Before Tax	122	91	245	182
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(39)	(33)	(78)	(64)
Amortization of prior service credit, tax	11	11	21	21
Total Tax Expense	(28)	(22)	(57)	(43)
Other Comprehensive Income, Net of Tax	94	69	188	139
Comprehensive Income	$ 44,724	$ 43,493	$ 81,897	$ 84,308