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PENSION PLANS AND OTHER POST-RETIREMENT BENEFITS - Components of Net Pension Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Defined Benefit Plan Disclosure [Line Items]        
Net pension expense     $ 9,294 $ 10,194
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 2,876 $ 2,758 8,672 8,300
Interest cost 3,533 3,242 10,573 9,727
Expected return of plan assets (3,342) (2,936) (9,951) (8,807)
Amortization of actuarial (gains) losses (1) 317 0 974
Net pension expense $ 3,066 $ 3,381 $ 9,294 $ 10,194