v2.4.0.6
Summary of Significant Accounting Policies (Gaming Investments) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
New Jersey
Dec. 31, 2012
Other Assets, Net
CRDA
Dec. 31, 2011
Other Assets, Net
CRDA
Regulatory Gaming Assets [Line Items]      
State gaming licenses, annual fee, percentage of licensee's gross gaming revenues 1.25%    
State alternative investment tax, percentage of gross gaming revenues 2.50%    
Borgata net deposits with CRDA   $ 28.5 $ 25.9