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Natural Disaster (Details)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2021
USD ($)
facility
Aug. 31, 2021
facility
Sep. 30, 2021
USD ($)
facility
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
facility
Sep. 30, 2020
USD ($)
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]            
Operating expenses     $ 325.4 $ 288.3 $ 982.7 $ 738.3
Hurricane            
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]            
Number of off-track betting facilities damaged | facility   15        
Number of off-track betting facilities closed | facility 2   2   2  
Reduction of property and equipment $ 3.1          
Operating expenses 2.2          
Insurance recovery receivable $ 5.3   $ 5.3   $ 5.3