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Employee Benefit Plans - Multi-Employer Plan (Details) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) lb | Jun. 30, 2018 USD ($)
Multiemployer Plans [Line Items] |  |  |
Employer contributions | $ 3,054 | $ 3,325 |
Multiemployer plan, estimated contribution in next fiscal year | 4,500 |  |
Western Conference of Teamsters Pension Plan |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer contributions | 1,685 | $ 3,634 | $ 1,605
Employer contributions (percentage) |  | 5.00% |
Program for Enhanced Early Retirement |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer contributions (percentage) |  | 6.50% |
Employer contributions (hours) | lb |  | 173 |
All Other Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Employer contributions | $ 34 | $ 39 | $ 35

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- Definition Multiemployer Plans, Collective-Bargaining Arrangement, Hours of Contributions + References No definition available. + Details
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- Definition Multiemployer Plans, Estimated Employer Contributions in Next Fiscal Year + References No definition available. + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Percentage of contributions required of employer under collective bargaining arrangement to total contributions required under all collective bargaining arrangements for pension and other postretirement plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947 + Details
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