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Commitments and Contingencies - Additional Information (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jun. 30, 2021 USD ($) item | Jun. 30, 2020 USD ($)
Commitments And Contingencies [Line Items] |  |
Number of potentially responsible parties | item | 140 |
Maximum |  |
Commitments And Contingencies [Line Items] |  |
Term of employment and severance agreement | 15 months |
Current And Long Term Liabilities |  |
Commitments And Contingencies [Line Items] |  |
Accrual for environmental loss contingencies | $ | $ 4,293 | $ 5,254

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 + Details
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