Pension and Other Postretirement Benefits - Funded Status of Other Postretirement Benefit Plans and Amounts Recognized in the Consolidated Balance Sheets (Details) - Other Postretirement Benefit Plan, Defined Benefit [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Change in Benefit Obligation
Benefit Obligation, Beginning of Year	$ 11,383	$ 12,365
Interest Cost	288	307	$ 404
Actuarial Losses	(1,402)	60
Benefits and expenses paid	(1,224)	(1,281)
Plan Amendments	68	(68)
Benefit Obligation, End of Year	9,113	11,383	$ 12,365
Funded Status of Plans	(9,113)	(11,383)
Amounts Recognized in Balance Sheet
Short-term Accrued Benefit Obligation	(1,189)	(1,252)
Accrued Postretirement Benefits	(7,924)	(10,131)
Net Amount Recognized	$ (9,113)	$ (11,383)