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Pension and Other Postretirement Benefits - Components of Net Periodic Pension (Income) Cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Net periodic pension income      
Special termination benefit charge   $ 14 $ 431
Pension plans contribution [Member]      
Net periodic pension income      
Service cost $ 909 1,181 963
Interest cost 34,013 35,551 32,235
Expected Return on Plans' Assets (42,655) (44,592) (40,124)
Amortization of transition obligation 0 76 84
Amortization of prior service cost (9) (4) 5
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment 0 0 (1)
Special termination benefit charge 302    
Settlement Loss 954 (4) 18
Recognition of actuarial losses 8,411 5,753 4,440
Net Periodic Benefit (Income) Cost $ 1,925 $ (2,025) $ (1,950)