XML 51 R38.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Gaming and Admission Taxes) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Gaming and Admission Taxes        
Gaming and admission taxes $ 13.8 $ 14.4 $ 43.1 $ 44.1