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Description of Business - Additional Information (Details)
gaming_location in Thousands, $ in Millions
12 Months Ended
Jan. 09, 2018
USD ($)
Dec. 31, 2017
state
gaming_location
Jan. 03, 2017
Oct. 02, 2015
Dec. 31, 2012
Variable Interest Entity [Line Items]          
Number of gaming locations | gaming_location   10      
Number of states in which the company operates | state   8      
Miami Valley Gaming LLC          
Variable Interest Entity [Line Items]          
Equity method investment, ownership percentage   50.00%     50.00%
Miami Valley Gaming LLC | Casino          
Variable Interest Entity [Line Items]          
Equity method investment, ownership percentage   50.00%      
Saratoga Casino Holdings LLC          
Variable Interest Entity [Line Items]          
Equity method investment, ownership percentage   25.00% 25.00% 25.00%  
Saratoga Casino Holdings LLC | Casino          
Variable Interest Entity [Line Items]          
Equity method investment, ownership percentage   25.00%      
Ocean Downs and Racing Services          
Variable Interest Entity [Line Items]          
Equity method investment, ownership percentage   62.50% 62.50%    
Subsequent Event | Big Fish Games | Discontinued Operations, Disposed of by Sale          
Variable Interest Entity [Line Items]          
Consideration in connection with the transaction | $ $ 990.0