Cooperative Marketing Agreement (Narrative) (Details) - USD ($)			3 Months Ended								12 Months Ended
	Oct. 06, 2015	Jul. 30, 2015	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Obligation under the Agreement to enhance purses for live horse racing meet due current											$ 6,200,000	$ 5,800,000
Obligation under Agreement to support joint marketing activities due current											944,000	660,000
Revenues related to marketing payment											926,000	825,000
Advertising and marketing expenses related to marketing payment											700,000	608,000,000,000
Depreciation related to marketing payment											226,000	217,000
Stock based compensation expense											284,628	217,094
Expense recorded as an offset to revenue			$ 10,802,370	$ 16,731,568	$ 14,848,077	$ 9,881,038	$ 10,263,711	$ 15,046,958	$ 13,784,714	$ 9,374,454	52,263,053	48,469,837
Gain on disposal of assets	$ 660,000										347,348	500
Proceeds from sale of RV Park											99,441	500
Shakopee Valley RV Park [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Gain on disposal of assets		$ 347,000
Proceeds from sale of RV Park		$ 100,000
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense											142,000	32,000
Expense recorded as an offset to revenue											$ 142,000	$ 32,000