Pension and Other Postretirement Benefits - Components of Net Periodic Pension (Income) Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Net periodic pension income
Special termination benefit charge		$ 277
Pension plans contribution [Member]
Net periodic pension income
Service cost	$ 963	1,117	$ 1,685
Interest cost	32,235	22,532	23,188
Expected Return on Plans' Assets	(40,124)	(51,928)	(53,653)
Amortization of transition obligation	84	94	94
Amortization of prior service cost	5	13	34
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(1)	(2)	(7)
Special termination benefit charge	431		(473)
Settlement Loss	18	205	3,190
Recognition of actuarial losses	4,440	11,702	13,606
Net Periodic Benefit (Income) Cost	$ (1,950)	$ (15,990)	$ (12,336)