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Discontinued Operations Discontinued Operations (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] |  |  |
Discontinued Operation, Revenue | $ 0 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue | $ 632,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue | $ 1,087,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Discontinued Operation, Operating Expense | 0 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense | 857,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense | 885,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Discontinued Operations, Selling, General and Adminstrative Expenses | 0 chdn_DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdminstrativeExpenses | 0 chdn_DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdminstrativeExpenses | 0 chdn_DisposalGroupIncludingDiscontinuedOperationSellingGeneralAndAdminstrativeExpenses
Discontinued Operation, Operating Income (Loss) | 0 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss | (225,000)us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss | 202,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
Discontinued Operations, Other (Expense) Income | 0 chdn_DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpense | 145,000 chdn_DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpense | (2,000)chdn_DisposalGroupIncludingDiscontinuedOperationOtherIncomeExpense
Discontinued Operation, (Loss) Earnings From Operations Before Benefit (Provision) For Income Taxes | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax | (80,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax | 200,000 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax
Discontinued Operation Income Tax Benefit (Provision) | 0 us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod | 30,000 us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod | (76,000)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod
Discontinued Operation, Loss From Operations | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | (50,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 124,000 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Loss on sale of assets | 0 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | (83,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | 0 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | (133,000)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 124,000 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Hollywood Park Racetrack [Member] |  |  |
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] |  |  |
Operating Expenses |  | $ 100,000 us-gaap_OperatingExpenses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = chdn_HollywoodParkRacetrackMember |

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