Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension Cost (Details)

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EMPLOYEE BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Components of net periodic pension cost      
Service cost $ 4,823 $ 4,220 $ 4,127
Interest cost 1,086 1,132 1,302
Return on plan assets (475) (476) (428)
Amortization of transitional obligation 0 0 0
Amortization of prior service cost 3 21 26
Amortization of net loss 1,214 1,047 1,731
Net periodic pension cost $ 6,651 $ 5,944 $ 6,758