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Commitments and Contingencies (Details) (USD $)
 12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
May 29, 2014
Dec. 31, 2011
Sep. 30, 1999
Commitments and Contingencies            
Rental payments charged to operations $ 75,000us-gaap_OperatingLeasesRentExpenseNet $ 44,000us-gaap_OperatingLeasesRentExpenseNet $ 52,000us-gaap_OperatingLeasesRentExpenseNet      
Provision for Contingent Obligation (30,000)dvd_ProvisionForContingentObligation (91,000)dvd_ProvisionForContingentObligation (321,000)dvd_ProvisionForContingentObligation      
Provision for contingent obligation 1,813,000us-gaap_DiscontinuedOperationAmountsOfMaterialContingentLiabilitiesRemaining 1,843,000us-gaap_DiscontinuedOperationAmountsOfMaterialContingentLiabilitiesRemaining        
Indirect Guarantee of Indebtedness            
Commitments and Contingencies            
Balance available in the sales and incremental property tax fund 1,932,000dvd_SalesAndIncrementalPropertyTaxFund
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember		 1,908,000dvd_SalesAndIncrementalPropertyTaxFund
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember		        
Amount paid into the sales and incremental property tax fund 979,000dvd_PaymentsIntoSalesAndIncrementalPropertyTaxFund
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember		          
Deduction from the sales and incremental property tax fund for principal and interest payments 955,000dvd_ReductionInSalesAndIncrementalPropertyTaxFundDueToPrincipalAndInterestPayments
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember		          
Change in Control Severance and Noncompete Payments and Benefits            
Commitments and Contingencies            
Maximum contingent liability, minimum 7,800,000us-gaap_LossContingencyRangeOfPossibleLossMinimum
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= dvd_ChangeInControlSeveranceAndNoncompetePaymentsAndBenefitsMember		          
Maximum contingent liability, maximum 9,600,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= dvd_ChangeInControlSeveranceAndNoncompetePaymentsAndBenefitsMember		          
Excise Tax under Excess Parachute Payment            
Commitments and Contingencies            
Maximum contingent liability, minimum 1,100,000us-gaap_LossContingencyRangeOfPossibleLossMinimum
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= dvd_ExciseTaxUnderExcessParachutePaymentMember		          
Maximum contingent liability, maximum 2,900,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= dvd_ExciseTaxUnderExcessParachutePaymentMember		          
Percentage of monthly amount paid in consideration of non-compete covenants 50.00%dvd_LossContingencyPercentageOfMonthlyAmountPaidInConsiderationOfNoncompeteCovenants
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= dvd_ExciseTaxUnderExcessParachutePaymentMember		          
Nontaxable Municipal Bonds | Indirect Guarantee of Indebtedness            
Commitments and Contingencies            
Debt issued           25,900,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember
Outstanding amount of debt 18,000,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember		          
Irrevocable direct-pay letter of credit issued 18,302,000dvd_IrrevocableLetterOfCreditIssued
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember		          
Nontaxable Municipal Bonds | Minimum | Indirect Guarantee of Indebtedness            
Commitments and Contingencies            
Annual principal payments 800,000us-gaap_DebtInstrumentAnnualPrincipalPayment
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		          
Nontaxable Municipal Bonds | Maximum | Indirect Guarantee of Indebtedness            
Commitments and Contingencies            
Annual principal payments 1,600,000us-gaap_DebtInstrumentAnnualPrincipalPayment
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_IndirectGuaranteeOfIndebtednessMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		          
Nashville Superspeedway            
Commitments and Contingencies            
Proceeds from sale of facility       27,000,000us-gaap_ProceedsFromDivestitureOfBusinesses
/ dei_LegalEntityAxis
= dvd_NashvilleSuperspeedwayMember		    
Nashville Superspeedway | Nontaxable Municipal Bonds            
Commitments and Contingencies            
Provision for Contingent Obligation         2,250,000dvd_ProvisionForContingentObligation
/ dei_LegalEntityAxis
= dvd_NashvilleSuperspeedwayMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember		  
(Increased) decreased in the provision for contingent obligation due to changing interest rates 30,000dvd_IncreaseDecreaseInProvisionForContingentObligation
/ dei_LegalEntityAxis
= dvd_NashvilleSuperspeedwayMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember		 91,000dvd_IncreaseDecreaseInProvisionForContingentObligation
/ dei_LegalEntityAxis
= dvd_NashvilleSuperspeedwayMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember		 316,000dvd_IncreaseDecreaseInProvisionForContingentObligation
/ dei_LegalEntityAxis
= dvd_NashvilleSuperspeedwayMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember		      
Provision for contingent obligation $ 1,813,000us-gaap_DiscontinuedOperationAmountsOfMaterialContingentLiabilitiesRemaining
/ dei_LegalEntityAxis
= dvd_NashvilleSuperspeedwayMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NontaxableMunicipalBondsMember