Business Operations - Dover International Speedway (Details)	9 Months Ended
Sep. 30, 2021 item
Business Operations
Number of events promoted	6
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

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