v2.4.0.6
Impairments and Other Operating Items, Net (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net $ 6,650,000 $ 8,007,000 $ 4,713,000
Impairments 1,053,526,000 6,051,000 0
Acquisition-related expenses
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net 18,651,000 6,375,000 3,977,000
Gain on insurance settlement, net of flood expenses
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net (7,098,000) 1,428,000 0
Gain on insurance proceeds
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net (7,694,000) 0 0
Hurricane expenses
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net 2,668,000 0 0
Asset write-downs, net of gain on disposal
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net 123,000 690,000 736,000
Measurement period adjustments
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net 0 (486,000) 0
Bargain purchase gain
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net   0.3  
Echelon Development
      
Component of Operating Other Cost and Expense [Line Items]      
Impairments 993,900,000    
Land | Undeveloped Land Parcel
      
Component of Operating Other Cost and Expense [Line Items]      
Impairments 39,400,000    
Building | Borgata
      
Component of Operating Other Cost and Expense [Line Items]      
Impairments 2,800,000    
Gaming License Rights | Sam's Town Hotel and Casino (Shreveport)
      
Component of Operating Other Cost and Expense [Line Items]      
Impairment of intangible assets, finite-lived 17,500,000    
Trademarks | Borgata
      
Component of Operating Other Cost and Expense [Line Items]      
Impairment of intangible assets, indefinite-lived   5,000,000  
Unconsolidated Subsidiary, ACES
      
Component of Operating Other Cost and Expense [Line Items]      
Impairments   1,100,000  
Equity method investment, ownership percentage   33.30%  
Carrying amount of equity investment 0 2,800,000  
Borgata Fire | Gain on insurance proceeds
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net 3,900,000    
Hurricane Irene | Gain on insurance proceeds
      
Component of Operating Other Cost and Expense [Line Items]      
Other operating items, net $ 3,800,000