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Organization and Basis of Presentation (Details)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 01, 2014
USD ($)
Sep. 30, 2015
item
Dec. 31, 2014
USD ($)
Jul. 07, 2015
Aug. 31, 2014
Organization and Basis of Presentation          
Reclassification from Other Assets to a reduction of Long-Term Debt associated with adoption of ASU No. 2015-3     $ 3.8    
Galleon | Silver Legacy Joint Venture          
Organization and Basis of Presentation          
Ownership interest (as a percent)   50.00%      
Resorts          
Organization and Basis of Presentation          
Ownership interest (as a percent)   48.10%      
Resorts | Silver Legacy Joint Venture          
Organization and Basis of Presentation          
Ownership interest (as a percent)   48.10%   48.10%  
Anticipated ownership acquisition (as a percent)   1.90%      
Resorts | Silver Legacy Joint Venture | Retained Interest Agreement          
Organization and Basis of Presentation          
Anticipated ownership acquisition (as a percent)   1.90%      
Ownership percentage allowed to be acquired       1.90%  
Resorts | Tamarack          
Organization and Basis of Presentation          
Ownership interest (as a percent)         21.30%
Gain (loss) on distribution of interest in equity method investment $ 0.0        
Equity Method Investment Distributed Carrying Amount $ 5.5        
Resorts | Circus Reno-Silver Legacy          
Organization and Basis of Presentation          
Anticipated ownership acquisition (as a percent)   50.00%      
Eldorado Casino Shreveport Joint Venture          
Organization and Basis of Presentation          
Number of rooms in suite art deco-style hotel | item   403