Related Party Transactions (Details) (USD $)			6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 DVD item mi	Jun. 30, 2013 DVD Allocation of costs of administrative and operating services	Jun. 30, 2012 DVD Allocation of costs of administrative and operating services	Jun. 30, 2013 DVD Allocation of costs of administrative and operating services	Jun. 30, 2012 DVD Allocation of costs of administrative and operating services	Jun. 30, 2013 DVD NASCAR event at Dover International Speedway	Jun. 30, 2012 DVD NASCAR event at Dover International Speedway	Jun. 30, 2013 DVD NASCAR event at Dover International Speedway	Jun. 30, 2012 DVD NASCAR event at Dover International Speedway	Jun. 30, 2013 Chairman of board of directors
Related Party Transactions
Costs allocated to DVD				$ 493,000	$ 512,000	$ 920,000	$ 933,000			$ 393,000	$ 376,000
Costs allocated to the entity by DVD				41,000	46,000	135,000	129,000	152,000	143,000	152,000	239,000
Payable to DVD	$ 57,000	$ 0						$ 57,000		$ 57,000
Harness racing track length (in miles)			0.625
Motorsports superspeedway length (in miles)			1
Period for set up and tear down rights			14 days
Number of annual motorsports weekends			2
Minimum percentage of voting power controlled by related party												50.00%
Minimum percentage of voting power of Gaming controlled by other related party												50.00%