Business Operations - Dover International Speedway (Details) - item		1 Months Ended	3 Months Ended				12 Months Ended
	Jun. 23, 2019	Jul. 31, 2012	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Operations
Number of events promoted			3	3	3	3		6
Total revenues (in percent)								96.00%	96.00%	96.00%
RFGV Festivals
Business Operations
Number of years Firefly Music Festival hosted								5 years
Number of options granted to extend rent agreement								2
NASCAR Cup Series events
Business Operations
Number of events promoted								2
NASCAR Xfinity Series events
Business Operations
Number of events promoted								2
NASCAR Gander RV & Outdoors Truck Series event
Business Operations
Number of events promoted								1
Nascar ARCA Menards Series East event
Business Operations
Number of events promoted								1
Firefly Music Festival ("Firefly")
Business Operations
Number of years Firefly Music Festival hosted								8 years
Number of days the event is held		3 days
Number of music acts featured in the event	120	40
Forecast
Business Operations
Number of events promoted							6