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Summary of Significant Accounting Policies - Change in estimate (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Service Life    
Change in Accounting Estimate [Line Items]    
Decrease in depreciation $ 2.6  
Favorable impact on earnings $ 2.4  
Video gaming terminals and equipment    
Change in Accounting Estimate [Line Items]    
Useful life 10 years 7 years
Video gaming terminals and equipment | Service Life    
Change in Accounting Estimate [Line Items]    
Useful life 10 years 7 years