Cooperative Marketing Agreement (Narrative) (Details) - USD ($)		3 Months Ended				6 Months Ended
	Jul. 30, 2015	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
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			$ 6,700,000		$ 6,200,000
Obligation under Agreement to support joint marketing activities due current						$ 1,197,000	$ 944,000
Other revenue		$ 1,677,602		$ 1,663,598		2,501,016	2,355,893
Advertising and marketing expense		717,714		703,698		937,706	909,309
Depreciation		618,030		607,605		1,194,510	1,171,710
Stock based compensation expense						155,030	157,983
Expense recorded as an offset to revenue		$ 13,885,992		$ 14,848,077		24,279,303	24,729,115
Cooperative Marketing Agreement (CMA) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other revenue						338,000	364,000
Advertising and marketing expense						225,000	251,000
Depreciation						113,000	113,000
Shakopee Valley RV Park [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from sale of RV Park	$ 100,000
Stock Appreciation Rights (SARs) [Member] | Cooperative Marketing Agreement (CMA) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other operating expense related to stock appreciation rights						$ 0	$ 142,000