Employee Benefit Plans - Fair Values of Plan Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Fair values of the plan assets by asset category
Fair value of plan assets	$ 61,286	$ 79,099	$ 75,791
Level 1
Fair values of the plan assets by asset category
Fair value of plan assets		3,592
Level 2
Fair values of the plan assets by asset category
Fair value of plan assets		71,631
Level 3
Fair values of the plan assets by asset category
Fair value of plan assets	$ 1,962	3,876	$ 5,732
Defined Benefit Plan, Cash and Cash Equivalents
Fair values of the plan assets by asset category
Fair value of plan assets		386
Defined Benefit Plan, Cash and Cash Equivalents | Level 1
Fair values of the plan assets by asset category
Fair value of plan assets		386
Defined Benefit Plan, Common Collective Trust, Global Large Cap Equities
Fair values of the plan assets by asset category
Fair value of plan assets		17,017
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		13,201
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		3,816
Defined Benefit Plan, Common Collective Trust, Fixed Income Securities
Fair values of the plan assets by asset category
Fair value of plan assets		56,414
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		56,414
Defined Benefit Plan, Common Collective Trust, Global Asset Allocations/Risk Parity
Fair values of the plan assets by asset category
Fair value of plan assets		2,016
Defined Benefit Plan, Common Collective Trust, Global Asset Allocations/Risk Parity | Level 2
Fair values of the plan assets by asset category
Fair value of plan assets		2,016
Mutual Fund
Fair values of the plan assets by asset category
Fair value of plan assets		3,206
Mutual Fund | Level 1
Fair values of the plan assets by asset category
Fair value of plan assets		3,206
Defined Benefit Plan, Plan Assets, Other
Fair values of the plan assets by asset category
Fair value of plan assets		60
Defined Benefit Plan, Plan Assets, Other | Level 3
Fair values of the plan assets by asset category
Fair value of plan assets		$ 60