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Employee Benefit Plans - Multi-Employer Plan (Details)
1 Months Ended 12 Months Ended
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