Business Operations - Dover International Speedway (Details) - item		1 Months Ended	3 Months Ended					12 Months Ended
	Jun. 17, 2018	Jul. 31, 2012	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Operations
Number of events promoted			3	3	1	2	3		6
Total revenues (in percent)									96.00%	96.00%	97.00%
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 Camping World Truck Series event
Business Operations
Number of events promoted									1
NASCAR K&N Pro Series East event
Business Operations
Number of events promoted									1
Firefly Music Festival ("Firefly")
Business Operations
Number of years Firefly Music Festival hosted									7 years
Number of days the event is held		3 days
Number of music acts featured in the event	120	40
Scheduled for 2019
Business Operations
Number of events promoted								6