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Employee Benefit Plans - Multi-Employer Plan (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2019 USD ($) plan | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2016 quarter | Jan. 05, 2015 USD ($) | Nov. 18, 2014 USD ($) | Jun. 30, 2012 USD ($)
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Defined contribution plan, employer matching contribution | $ 1,600 | $ 2,200 | $ 2,000 |  |  |  |  |
Employer contributions |  | 3,325 | 3,804 |  |  |  |  |
Multiemployer plan, period contribution | 5,300 | 5,200 | 4,800 |  |  |  |  |
Multiemployer plan, estimated contribution in next fiscal year |  | 5,800 |  |  |  |  |  |
Western Conference of Teamsters Pension Plan |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  | 3,634 | $ 1,605 | $ 2,114 |  |  |  |
Employer contributions (percentage) |  |  | 5.00% |  |  |  |  |
Labor Management Pension Fund |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Withdrawal obligation |  |  |  |  |  | $ 4,900 | $ 4,400 | $ 4,300
Multiemployer plan, quarterly installments for withdrawal liability | $ 100 |  |  |  |  |  |  |
Multiemployer plan, quarterly installments for withdrawal liability, number of quarters | quarter |  |  |  |  | 80 |  |  |
Program for Enhanced Early Retirement |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Employer contributions (percentage) |  |  | 6.50% |  |  |  |  |
Employer contributions (hours) |  |  | 173 |  |  |  |  |
All Other Plans |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  | $ 39 | $ 35 | 39 |  |  |  |
Other Postretirement Benefits Plan |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plans, number of plans | plan |  | 9 |  |  |  |  |  |
Employer contributions |  |  | $ 618 | $ 771 |  |  |  |
Multiemployer Plans, Defined Benefit Pension Plans [Member] |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plans, number of plans | plan |  | 2 |  |  |  |  |  |

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- Definition Defined Contribution Plan, Employer Matching Contribution, Amount + References No definition available. + Details
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- Definition Multiemployer Plan, Number of Plans + References No definition available. + Details
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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 Multiemployer Plans, Withdrawal Obligation, Monthly Payment Election, Periodic Payment Amount + References No definition available. + Details
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- Definition Multiemployer Plans, Withdrawal Obligation, Monthly Payment Election, Periodic Payment Period + 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 Amount of the obligation recognized by withdrawing from a pension or postretirement benefit 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 No definition available. + Details
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