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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

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