v2.4.0.6
Summary of Significant Accounting Policies (Noncontrolling Interest) (Details)
Dec. 31, 2012
Dec. 31, 2011
Borgata
   
Noncontrolling Interest [Line Items]    
Ownership percentage by noncontrolling owners 50.00% 50.00%
LVE
   
Noncontrolling Interest [Line Items]    
Ownership percentage by noncontrolling owners   100.00%
LVE
   
Noncontrolling Interest [Line Items]    
Ownership percentage by noncontrolling owners 100.00%