Business Operations - Dover International Speedway (Details) - item	1 Months Ended		12 Months Ended
	Jun. 30, 2020	Jul. 31, 2012	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Operations
Number of events promoted			6
Total revenues (in percent)			98.00%	96.00%	96.00%
RFGV Festivals
Business Operations
Number of options granted to extend rent agreement			2
Number of years Firefly Music Festival hosted			5 years
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