Pension and Other Postretirement Benefits - Components of Net Periodic Pension (Income) Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Net periodic pension income
Special termination benefit charge		$ 431	$ 277
Pension plans contribution [Member]
Net periodic pension income
Service cost	$ 1,181	963	1,117
Interest cost	35,551	32,235	22,532
Expected Return on Plans' Assets	(44,592)	(40,124)	(51,928)
Amortization of transition obligation	76	84	94
Amortization of prior service cost	(4)	5	13
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0	(1)	(2)
Special termination benefit charge	14
Settlement Loss	(4)	18	205
Recognition of actuarial losses	5,753	4,440	11,702
Net Periodic Benefit (Income) Cost	$ (2,025)	$ (1,950)	$ (15,990)