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Segment Information - Additional Information (Details) - segment
12 Months Ended
Dec. 31, 2020
Aug. 31, 2018
Aug. 30, 2018
Jul. 16, 2018
Jan. 01, 2017
Segment Reporting Information [Line Items]          
Number of operating segments 3        
Number of reportable segments 3        
Ocean Downs          
Segment Reporting Information [Line Items]          
Equity method investment, ownership percentage   100.00% 50.00% 50.00% 50.00%
Saratoga          
Segment Reporting Information [Line Items]          
Equity method investment, ownership percentage   25.00%   25.00%