2.4.0.84020 - Disclosure - Business Operations (Details)truefalsefalse1false USDfalsefalse$D2012Q2_M06http://www.sec.gov/CIK0001162556duration2012-06-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q1_M02http://www.sec.gov/CIK0001162556duration2012-02-01T00:00:002012-02-29T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalseD2013Q2YTDhttp://www.sec.gov/CIK0001162556duration2013-01-01T00:00:002013-06-30T00:00:00AgentStandardhttp://www.doverdowns.com/20130630agentdde0Square_FootStandardhttp://www.xbrl.org/2009/utrsqftutr0RoomStandardhttp://www.doverdowns.com/20130630roomdde0SubsidiaryStandardhttp://www.doverdowns.com/20130630subsidiarydde0OutletStandardhttp://www.doverdowns.com/20130630outletdde0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$4false USDfalsefalse$D2014Q2_12Mhttp://www.sec.gov/CIK0001162556duration2013-07-02T00:00:002014-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDfalsefalse$I2013Q3_M0701http://www.sec.gov/CIK0001162556instant2013-07-01T00:00:000001-01-01T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6false falsefalseI2013Q1_M0228http://www.sec.gov/CIK0001162556instant2013-02-28T00:00:000001-01-01T00:00:00ItemStandardhttp://www.doverdowns.com/20130630itemdde0Square_FootStandardhttp://www.xbrl.org/2009/utrsqftutr07false falsefalseI2002Q1http://www.sec.gov/CIK0001162556instant2002-03-31T00:00:000001-01-01T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli01true 1dde_BusinessOperationsDisclosureAbstractdde_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Business Operations2false 2dde_AreaOfCasinodde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse165000165000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsenum:areaItemTypedecimalRepresents the area of the casino.No definition available.false256Area of casino (in square feet)3false 2dde_NumberOfRetailOutletsdde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse44falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of retail outlets.No definition available.false256Number of retail outlets4false 2dde_NumberOfRoomsInHoteldde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse500500falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of rooms in the hotel operated by the entity.No definition available.false256Number of rooms in AAA Four Diamond hotel5false 2dde_NumberOfSeatsInRestaurantdde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6truefalsefalse110110falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of seats in the restaurant operated by the entity.No definition available.false256Number of seats in sports-themed restaurant6false 2dde_AreaOfLeasedPropertydde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6truefalsefalse41004100falsefalsefalse7falsefalsefalse00falsefalsefalsenum:areaItemTypedecimalRepresents the area of the leased property.No definition available.false256Area of leased property (in square feet)7false 2dde_NumberOfWhollyOwnedSubsidiariesdde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse22falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of wholly owned subsidiaries of the entity.No definition available.false256Number of wholly owned subsidiaries8false 2dde_StockholdersEquityNoteSpinoffTransactionPercentageContributedByParentdde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7truetruefalse1.001.00falsefalsefalsenum:percentItemTypepureRepresents the percentage of issued and outstanding common stock contributed by parent as a result of a tax-free spin-off transaction.No definition available.false0Percentage of the issued and outstanding common stock of Dover Downs, Inc. contributed by DVD9false 2dde_PercentageOfIssuedAndOutstandingCommonStockDistributedToParentStockholdersdde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7truetruefalse1.001.00falsefalsefalsenum:percentItemTypepureRepresents the percentage of issued and outstanding common stock distributed to parent stockholders.No definition available.false0Percentage of issued and outstanding common stock distributed to parent stockholders10false 2dde_LicensedAgentsNumberUnderDelawareStateLotteryCodedde_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse33falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of licensed agents under the Delaware State Lottery Code.No definition available.false256Number of Licensed Agents under Delaware State Lottery Code11false 2dde_NumberOfConsecutiveYearsForWhichAnnualLicenseHasBeenReceiveddde_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse0044 yearsfalsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaRepresents the number of consecutive years for which annual license has been received from the Delaware Harness Racing Commission.No definition available.false0Number of consecutive years for which annual license has been received from the Harness Racing Commission12false 2dde_StateWideNetProceedsOfInternetVersionsToBeRetainedInLotterydde_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse37500003750000USD$falsetruefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the state-wide net proceeds to be retained in lottery before its distribution.No definition available.false2State-wide net proceeds to be retained in lottery13false 2dde_PaymentsForGamingLicenseFeedde_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse15400001540000USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of cash paid for gaming license fee during the period.No definition available.false2Gaming license fee paid14false 2dde_PaymentsForTableGameLicenseFeedde_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse22410002241000USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse10170001017000USD$falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of cash paid for table game license fee during the period.No definition 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