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Pension Plans and Other Postretirement Benefit Plan - Schedule of Amounts Recognized in Other Comprehensive Income (Loss) (Details) - Other Comprehensive Income (Loss) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Pension Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actuarial (loss) gain, net | $ (463) | $ 288 | $ 3,318
Recognized actuarial loss (gain) | 335 | 358 | 585
Settlement gain | 0 | (12) | 0
Total recognized in other comprehensive (loss) income | (128) | 634 | 3,903
Postretirement Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Actuarial (loss) gain, net | (60) | (292) | 243
Recognized actuarial loss (gain) | (23) | (69) | (27)
Settlement gain | 0 | 0 | 0
Total recognized in other comprehensive (loss) income | $ (83) | $ (361) | $ 216

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- Definition Amount, before tax, after reclassification adjustment, of increase (decrease) in accumulated other comprehensive income from gain (loss) of defined benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A + Details
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