Employee Benefit Plans - Multi-Employer Plan (Details)		1 Months Ended	12 Months Ended
		Oct. 31, 2011	Jun. 30, 2017 USD ($) plan		Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jan. 05, 2015 USD ($)	Nov. 18, 2014 USD ($)	Jun. 30, 2014 quarter	Jun. 30, 2012 USD ($)
Multiemployer Plans [Line Items]
Multiemployer Plan Percent Expected To Be Funded			90.00%
Employer contributions (hours)			173
Multiemployer plan, period contribution			$ 5,300,000		$ 6,300,000	$ 6,900,000
Multiemployer plan, estimated contribution in next fiscal year			$ 5,000,000
Western Conference of Teamsters Pension Plan
Multiemployer Plans [Line Items]
Funded status of multiemployer plans			91.70%		91.80%
Multiemployer plan, unfunded benefit liability					$ 7,000,000
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			$ 4,000,000	[1]	$ 3,800,000		$ 4,900,000	$ 4,400,000		$ 4,300,000
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	[1]				$ 2,200,000
Multiemployer Plans, Pension | Western Conference of Teamsters Pension Plan
Multiemployer Plans [Line Items]
Employer contributions			$ 2,114,000		2,587,000	3,593,000
Multiemployer Plans, Pension | All Other Plans
Multiemployer Plans [Line Items]
Employer contributions			$ 39,000		39,000	$ 41,000
Other Postretirement Benefits Plan
Multiemployer Plans [Line Items]
Multiemployer plans, number of plans | plan			10
Employer contributions			$ 399,000		$ 978,000
Multiemployer Plans, Defined Benefit Pension Plans [Member]
Multiemployer Plans [Line Items]
Multiemployer plans, number of plans | plan			2

[1] Includes $86.5 million in estimated future benefit payments on single employer pension plan obligations, $4.0 million in estimated payments in fiscal 2018 towards settlement of withdrawal liability associated with the Company’s withdrawal from the Local 807 Labor Management Pension Plan and $2.2 million in estimated fiscal 2018 contributions to the multiemployer pension plans. See Note 15.