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Employee Benefit Plans - Fair Values of Plan Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Fair values of the plan assets by asset category      
Fair value of plan assets $ 58,387 $ 61,286 $ 79,099
Level 1      
Fair values of the plan assets by asset category      
Fair value of plan assets 7,489 4,050  
Level 2      
Fair values of the plan assets by asset category      
Fair value of plan assets 49,346 55,274  
Level 3      
Fair values of the plan assets by asset category      
Fair value of plan assets 1,552 1,962 $ 3,876
Defined Benefit Plan, Cash and Cash Equivalents      
Fair values of the plan assets by asset category      
Fair value of plan assets 6,063 362  
Defined Benefit Plan, Cash and Cash Equivalents | Level 1      
Fair values of the plan assets by asset category      
Fair value of plan assets 6,063 362  
Defined Benefit Plan, Common Collective Trust, Global Large Cap Equities      
Fair values of the plan assets by asset category      
Fair value of plan assets 7,071 10,735  
Defined Benefit Plan, Common Collective Trust, Global Large Cap Equities | Level 2      
Fair values of the plan assets by asset category      
Fair value of plan assets 5,552 8,783  
Defined Benefit Plan, Common Collective Trust, Global Large Cap Equities | Level 3      
Fair values of the plan assets by asset category      
Fair value of plan assets 1,519 1,952  
Defined Benefit Plan, Common Collective Trust, Fixed Income Securities      
Fair values of the plan assets by asset category      
Fair value of plan assets 43,794 47,156  
Defined Benefit Plan, Common Collective Trust, Fixed Income Securities | Level 1      
Fair values of the plan assets by asset category      
Fair value of plan assets   665  
Defined Benefit Plan, Common Collective Trust, Fixed Income Securities | Level 2      
Fair values of the plan assets by asset category      
Fair value of plan assets 43,794 46,491  
Mutual Fund      
Fair values of the plan assets by asset category      
Fair value of plan assets 1,426 3,023  
Mutual Fund | Level 1      
Fair values of the plan assets by asset category      
Fair value of plan assets 1,426 3,023  
Defined Benefit Plan, Plan Assets, Other      
Fair values of the plan assets by asset category      
Fair value of plan assets 33 10  
Defined Benefit Plan, Plan Assets, Other | Level 3      
Fair values of the plan assets by asset category      
Fair value of plan assets $ 33 $ 10