Operating Leases - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2002
Leases [Abstract]
Total rent expense for all operating leases	$ 16,000,000	$ 18,300,000	$ 18,900,000
Payment to re-acquire Churchill Downs facility in future period				$ 1.00