Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 89,586	$ 142,332	$ 136,983
Defined Benefit Pension and Postretirement Benefit Plans:
Net (loss) gain arising during the period, before tax	(4,029)	4,490	(2,662)
Amortization of loss, before tax	401	672	546
Amortization of prior service credit, before tax	(181)	(181)	(182)
Total Other Comprehensive (Loss) Income, Before Tax	(3,809)	4,981	(2,298)
Tax Attributes of Items in Other Comprehensive (Loss) Income:
Net (loss) gain arising during the period, tax	942	(1,049)	622
Amortization of loss, tax	(94)	(157)	(128)
Amortization of prior service credit, tax	42	42	42
Total Tax Benefit (Expense)	890	(1,164)	536
Other Comprehensive (Loss) Income, Net of Tax	(2,919)	3,817	(1,762)
Comprehensive Income	$ 86,667	$ 146,149	$ 135,221