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Employee Benefit Plans - Change in Accumulated Other Comprehensive (Income) Loss (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Accumulated Other Comprehensive (Income) Loss Related to Pension Plan      
Balance at beginning of period $ (18,213) $ (18,059)  
Amortization of net actuarial loss 465 453  
Current period net actuarial loss (gain) (2,302) (607)  
Net change (1,837) (154) $ 12,918
Balance at end of period $ (20,050) $ (18,213) $ (18,059)