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Employee Benefit Plans - Multi-Employer Plan (Details) | 1 Months Ended | 12 Months Ended |  |  |  |
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Oct. 31, 2011 | Jun. 30, 2016 USD ($) plan | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jan. 05, 2015 USD ($) | Nov. 18, 2014 USD ($) | Jun. 30, 2013 quarter | Dec. 31, 2011
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plans, number of plans | plan |  | 2 |  |  |  |  |  |
Employer contributions (hours) |  | 173 |  |  |  |  |  |
Multiemployer plan, period contribution |  | $ 6,300,000 | $ 6,900,000 | $ 6,600,000 |  |  |  |
Defined Contribution |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plans, number of plans | plan |  | 10 |  |  |  |  |  |
Western Conference of Teamsters Pension Plan |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Funded status of multiemployer plans |  |  | 91.70% | 91.90% |  |  |  |
Multiemployer plan, unfunded benefit liability |  |  | $ 9,100,000 |  |  |  |  |
Multiemployer plan, unfunded benefit liability calculation, number of years | 3 years |  |  |  |  |  |  |
Multiemployer plan, unfunded benefit liability calculation, lookback period | 10 years |  |  |  |  |  |  |
Multiemployer plan, unfunded benefit liability calculation, interest rate | 7.00% |  |  |  |  |  |  |
Employer contributions (percentage) |  |  |  |  |  |  |  | 5.00%
Labor Management Pension Fund |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Withdrawal obligation |  | $ 4,300,000 | $ 4,300,000 |  | $ 4,900,000 | $ 4,400,000 |  |
Multiemployer plan, quarterly installments for withdrawal liability |  | $ 91,000 |  | $ 100,000 |  |  |  |
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% |  |  |  |  |
Green Zone | Minimum |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Funded status of multiemployer plans |  |  | 80.00% |  |  |  |  |
Multiemployer Plans, Pension |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plan, estimated contribution in next fiscal year |  |  | $ 3,300,000 |  |  |  |  |
Multiemployer Plans, Pension | Multiemployer Plans, Defined Benefit Pension Plans [Member] |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plans, number of plans | plan |  | 2 |  |  |  |  |  |
Multiemployer Plans, Pension | Western Conference of Teamsters Pension Plan |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  | $ 2,587,000 | 3,593,000 | 3,153,000 |  |  |  |
Multiemployer Plans, Pension | All Other Plans |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Employer contributions |  | 39,000 | $ 41,000 | $ 34,000 |  |  |  |
Other Pension Plan, Postretirement or Supplemental Plans |  |  |  |  |  |  |  |
Multiemployer Plans [Line Items] |  |  |  |  |  |  |  |
Multiemployer plan, estimated contribution in next fiscal year |  | $ 6,500,000 |  |  |  |  |  |

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