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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 |

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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