2.4.0.6 Html 171 303 1 false 56 0 false 11 false false R1.htm 0000 - Document - Document and Entity Information Sheet http://www.doverdowns.com/role/DocumentAndEntityInformation Document and Entity Information false false R2.htm 0010 - Statement - CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS Sheet http://www.doverdowns.com/role/StatementOfIncome CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS true false R3.htm 0020 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.doverdowns.com/role/BalanceSheet CONSOLIDATED BALANCE SHEETS false false R4.htm 0025 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.doverdowns.com/role/BalanceSheetParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) false false R5.htm 0030 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.doverdowns.com/role/CashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS false false R6.htm 1010 - Disclosure - Business Operations Sheet http://www.doverdowns.com/role/DisclosureBusinessOperations Business Operations false false R7.htm 1020 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.doverdowns.com/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies false false R8.htm 1030 - Disclosure - Property and Equipment Sheet http://www.doverdowns.com/role/DisclosurePropertyAndEquipment Property and Equipment false false R9.htm 1040 - Disclosure - Accrued Liabilities Sheet http://www.doverdowns.com/role/DisclosureAccruedLiabilities Accrued Liabilities false false R10.htm 1050 - Disclosure - Credit Facility Sheet http://www.doverdowns.com/role/DisclosureCreditFacility Credit Facility false false R11.htm 1060 - Disclosure - Income Taxes Sheet http://www.doverdowns.com/role/DisclosureIncomeTaxes Income Taxes false false R12.htm 1070 - Disclosure - Pension Plans Sheet http://www.doverdowns.com/role/DisclosurePensionPlans Pension Plans false false R13.htm 1080 - Disclosure - Stockholders' Equity Sheet http://www.doverdowns.com/role/DisclosureStockholdersEquity Stockholders' Equity false false R14.htm 1090 - Disclosure - Financial Instruments Sheet http://www.doverdowns.com/role/DisclosureFinancialInstruments Financial Instruments false false R15.htm 1100 - Disclosure - Related Party Transactions Sheet http://www.doverdowns.com/role/DisclosureRelatedPartyTransactions Related Party Transactions false false R16.htm 1110 - Disclosure - Commitments and Contingencies Sheet http://www.doverdowns.com/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies false false R17.htm 1120 - Disclosure - Quarterly Results (unaudited) Sheet http://www.doverdowns.com/role/DisclosureQuarterlyResults Quarterly Results (unaudited) false false R18.htm 2020 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.doverdowns.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) false false R19.htm 3020 - Disclosure - Summary of Significant Accounting Policies (Tables) Sheet http://www.doverdowns.com/role/DisclosureSummaryOfSignificantAccountingPoliciesTables Summary of Significant Accounting Policies (Tables) false false R20.htm 3030 - Disclosure - Property and Equipment (Tables) Sheet http://www.doverdowns.com/role/DisclosurePropertyAndEquipmentTables Property and Equipment (Tables) false false R21.htm 3040 - Disclosure - Accrued Liabilities (Tables) Sheet http://www.doverdowns.com/role/DisclosureAccruedLiabilitiesTables Accrued Liabilities (Tables) false false R22.htm 3060 - Disclosure - Income Taxes (Tables) Sheet http://www.doverdowns.com/role/DisclosureIncomeTaxesTables Income Taxes (Tables) false false R23.htm 3070 - Disclosure - Pension Plans (Tables) Sheet http://www.doverdowns.com/role/DisclosurePensionPlansTables Pension Plans (Tables) false false R24.htm 3080 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.doverdowns.com/role/DisclosureStockholdersEquityTables Stockholders' Equity (Tables) false false R25.htm 3090 - Disclosure - Financial Instruments (Tables) Sheet http://www.doverdowns.com/role/DisclosureFinancialInstrumentsTables Financial Instruments (Tables) false false R26.htm 3120 - Disclosure - Quarterly Results (unaudited) (Tables) Sheet http://www.doverdowns.com/role/DisclosureQuarterlyResultsTables Quarterly Results (unaudited) (Tables) false false R27.htm 4010 - Disclosure - Business Operations (Details) Sheet http://www.doverdowns.com/role/DisclosureBusinessOperationsDetails Business Operations (Details) false false R28.htm 4020 - Disclosure - Summary of Significant Accounting Policies (Details) Sheet http://www.doverdowns.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails Summary of Significant Accounting Policies (Details) false false R29.htm 4021 - Disclosure - Summary of Significant Accounting Policies (Details 2) Sheet http://www.doverdowns.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails2 Summary of Significant Accounting Policies (Details 2) false false R30.htm 4022 - Disclosure - Summary of Significant Accounting Policies (Details 3) Sheet http://www.doverdowns.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails3 Summary of Significant Accounting Policies (Details 3) false false R31.htm 4030 - Disclosure - Property and Equipment (Details) Sheet http://www.doverdowns.com/role/DisclosurePropertyAndEquipmentDetails Property and Equipment (Details) false false R32.htm 4040 - Disclosure - Accrued Liabilities (Details) Sheet http://www.doverdowns.com/role/DisclosureAccruedLiabilitiesDetails Accrued Liabilities (Details) false false R33.htm 4050 - Disclosure - Credit Facility (Details) Sheet http://www.doverdowns.com/role/DisclosureCreditFacilityDetails Credit Facility (Details) false false R34.htm 4060 - Disclosure - Income Taxes (Details) Sheet http://www.doverdowns.com/role/DisclosureIncomeTaxesDetails Income Taxes (Details) false false R35.htm 4070 - Disclosure - Pension Plans (Details) Sheet http://www.doverdowns.com/role/DisclosurePensionPlansDetails Pension Plans (Details) false false R36.htm 4071 - Disclosure - Pension Plans (Details 2) Sheet http://www.doverdowns.com/role/DisclosurePensionPlansDetails2 Pension Plans (Details 2) false false R37.htm 4072 - Disclosure - Pension Plans (Details 3) Sheet http://www.doverdowns.com/role/DisclosurePensionPlansDetails3 Pension Plans (Details 3) false false R38.htm 4080 - Disclosure - Stockholders' Equity (Details) Sheet http://www.doverdowns.com/role/DisclosureStockholdersEquityDetails Stockholders' Equity (Details) false false R39.htm 4081 - Disclosure - Stockholders' Equity (Details 2) Sheet http://www.doverdowns.com/role/DisclosureStockholdersEquityDetails2 Stockholders' Equity (Details 2) false false R40.htm 4082 - Disclosure - Stockholders' Equity (Details 3) Sheet http://www.doverdowns.com/role/DisclosureStockholdersEquityDetails3 Stockholders' Equity (Details 3) false false R41.htm 4090 - Disclosure - Financial Instruments (Details) Sheet http://www.doverdowns.com/role/DisclosureFinancialInstrumentsDetails Financial Instruments (Details) false false R42.htm 4100 - Disclosure - Related Party Transactions (Details) Sheet http://www.doverdowns.com/role/DisclosureRelatedPartyTransactionsDetails Related Party Transactions (Details) false false R43.htm 4110 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.doverdowns.com/role/DisclosureCommitmentsAndContingenciesDetails Commitments and Contingencies (Details) false false R44.htm 4120 - Disclosure - Quarterly Results (unaudited) (Details) Sheet http://www.doverdowns.com/role/DisclosureQuarterlyResultsDetails Quarterly Results (unaudited) (Details) false false All Reports Book All Reports Element us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax had a mix of decimals attribute values: -3 0. Element us-gaap_StockRepurchasedAndRetiredDuringPeriodValue had a mix of decimals attribute values: -3 0. 'Monetary' elements on report '4010 - Disclosure - Business Operations (Details)' had a mix of different decimal attribute values. 'Shares' elements on report '4022 - Disclosure - Summary of Significant Accounting Policies (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '4022 - Disclosure - Summary of Significant Accounting Policies (Details 3)' had a mix of different decimal attribute values. 'Monetary' elements on report '4080 - Disclosure - Stockholders' Equity (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '4090 - Disclosure - Financial Instruments (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '4100 - Disclosure - Related Party Transactions (Details)' had a mix of different decimal attribute values. Process Flow-Through: 0010 - Statement - CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE EARNINGS Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2012' Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2011' Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2011' Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2011' Process Flow-Through: 0020 - Statement - CONSOLIDATED BALANCE SHEETS Process Flow-Through: Removing column 'Dec. 31, 2010' Process Flow-Through: Removing column 'Dec. 31, 2009' Process Flow-Through: 0025 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Process Flow-Through: 0030 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS dde-20121231.xml dde-20121231.xsd dde-20121231_cal.xml dde-20121231_def.xml dde-20121231_lab.xml dde-20121231_pre.xml true true