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Property and Equipment - Additional Information (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2016
USD ($)
a
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Property, Plant and Equipment [Line Items]          
Depreciation expense     $ 57.6 $ 49.1 $ 49.1
Area of land sold | a 61        
Gain on sale of land     $ 0.0 $ 0.0 $ 23.7
Land          
Property, Plant and Equipment [Line Items]          
Proceeds from sale of land held-for-use $ 25.6        
Gain on sale of land $ 23.7        
Online Wagering          
Property, Plant and Equipment [Line Items]          
Long-lived asset impairment   $ 13.7