Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 34,370	$ 44,630	$ 65,025	$ 81,709
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	100	168	200	336
Amortization of prior service credit, before tax	(46)	(46)	(91)	(91)
Total Other Comprehensive Income, Before Tax	54	122	109	245
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(24)	(39)	(47)	(78)
Amortization of prior service credit, tax	11	11	21	21
Total Tax Expense	(13)	(28)	(26)	(57)
Other Comprehensive Income, Net of Tax	41	94	83	188
Comprehensive Income	$ 34,411	$ 44,724	$ 65,108	$ 81,897