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Subsequent Events - Additional Information (Details)
10 Months Ended 12 Months Ended
Feb. 28, 2018
purchase_agreement
Feb. 12, 2018
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
Nov. 29, 2017
USD ($)
Apr. 25, 2017
USD ($)
Feb. 29, 2016
USD ($)
Feb. 24, 2016
USD ($)
Oct. 28, 2015
USD ($)
Subsequent Event [Line Items]                      
Authorized stock repurchase amount           $ 150,000,000.0 $ 500,000,000.0 $ 250,000,000.0 $ 150,000,000.0 $ 150,000,000.0 $ 150,000,000.0
Stock repurchased during period (in shares) | shares         211,790            
Repurchase aggregate cost       $ 190,900,000 $ 39,000,000 $ 151,100,000          
Subsequent Event                      
Subsequent Event [Line Items]                      
Stock repurchased during period (in shares) | shares   1,886,792                  
Repurchase price (in dollars per share) | $ / shares   $ 265.00                  
Repurchase aggregate cost   $ 500,000,000                  
Presque Isle Downs & Casino And Lady Luck Casino | Subsequent Event                      
Subsequent Event [Line Items]                      
Number of purchase agreements | purchase_agreement 2                    
Scenario, Forecast | Presque Isle Downs & Casino And Lady Luck Casino | Subsequent Event                      
Subsequent Event [Line Items]                      
Consideration to be paid     $ 229,500,000