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Litigation, Claims, Contingencies and Other (Details) (USD $)
 6 Months Ended
Jun. 30, 2014
Agreement
Jan. 31, 2014
Dec. 31, 2013
Loss Contingencies [Line Items]      
Environmental remediation liability $ 4,900,000    
Maximum potential amount of future payments 10,000,000    
Guarantees relate to leased facilities expiry date October 2017    
Recourse provision to recover guarantees 0    
Bargaining agreements 100    
Self Insurance Reserve 20,800,000    
Workers' Compensation Liability 12,500,000    
Self Insurance Reserve, Employee Health Benefits 1,000,000    
Self Insurance Reserve, General and Auto Insurance 7,300,000    
Self Insurance Reserve, Discontinued Operations 4,900,000    
Payments for Self Insurance Reserves, Net 2,700,000    
Liability in Excess of Self Insurance Levels 5,000,000    
Liability in Excess of Self Insurance Levels, Workers Compensation 1,700,000    
Liability in Excess of Self Insurance Levels, General Liability 3,300,000    
Revenue through concession contract     47.00%
Possessory interest   25,000,000  
Estimated amount for personal property   5,000,000  
Minimum
      
Loss Contingencies [Line Items]      
Insurance Liability, Per Claim, General Range 200,000    
Maximum
      
Loss Contingencies [Line Items]      
Insurance Liability, Per Claim, General Range $ 400,000