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Employee Benefits - Plan's Funded Status and Pension Cost (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Change in benefit obligation    
Beginning of year $ 2,919 $ 2,770
Service cost 53 50
Interest cost 93 107
Actuarial gain 355 106
Benefits paid (114) (114)
End of year $ 3,306 $ 2,919