Employee Benefit Plans - Multi-Employer Plan (Details) - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jan. 05, 2015	Nov. 18, 2014	Jun. 30, 2012	Dec. 31, 2011
Multiemployer Plans [Line Items]
Multiemployer Plan, Period Contributions	$ 6,900,000	$ 6,600,000	$ 5,800,000
Western Conference of Teamsters Pension Plan
Multiemployer Plans [Line Items]
Funded status of multiemployer plans		91.90%	91.50%
Employer contributions (percentage)							5.00%
Labor Management Pension Fund
Multiemployer Plans [Line Items]
Withdrawal obligation				$ 4,900,000	$ 4,400,000	$ 4,300,000
Multiemployer Plans, Withdrawal Obligation, Monthly Payment Election, Periodic Payment Amount	91,000		$ 100,000
Program for Enhanced Early Retirement
Multiemployer Plans [Line Items]
Employer contributions (percentage)		6.50%
Employer contributions (hours)
Multiemployer Plans, Pension
Multiemployer Plans [Line Items]
Multiemployer Other than Pension Plan, Estimated Future Employer Contributions in Next Fiscal Year		$ 4,100,000
Multiemployer Plans, Pension | Western Conference of Teamsters Pension Plan
Multiemployer Plans [Line Items]
Employer contributions	3,593,000	3,153,000	3,064,000
Multiemployer Plans, Pension | All Other Plans
Multiemployer Plans [Line Items]
Employer contributions	41,000	$ 34,000	$ 37,000
Other Pension Plan, Postretirement or Supplemental Plans [Member]
Multiemployer Plans [Line Items]
Multiemployer Other than Pension Plan, Estimated Future Employer Contributions in Next Fiscal Year	$ 7,300,000