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PENSION PLANS AND OTHER POST RETIREMENT BENEFITS - Components of Net Pension Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Defined Benefit Plan Disclosure [Line Items]      
Net pension expense $ 9,207 $ 6,606 $ 6,616
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 6,921 4,404 3,693
Interest cost 7,091 2,271 1,733
Expected return of plan assets (5,502) (1,299) (214)
Amortization of actuarial (gains) losses 246 1,008 1,399
Settlement cost 451 0 0
Net pension expense $ 9,207 $ 6,384 $ 6,611