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Income Taxes (Details) (USD $) | 12 Months Ended | 1 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2003 | Oct. 31, 2012 | Dec. 31, 2011
Income Taxes [Line Items] |  |  |  |  |  |
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions | $ 326,000 us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | $ 8,380,000 us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions | $ 934,000 us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions |  |  |
Income tax provision | (30,161,000)us-gaap_IncomeTaxExpenseBenefit | (30,473,000)us-gaap_IncomeTaxExpenseBenefit | (33,075,000)us-gaap_IncomeTaxExpenseBenefit |  |  |
Combined benefits received | 6,400,000 chdn_DeferredTaxAssetsCombinedBenefitsReceived |  |  |  |  |
Sales tax receivable | 600,000 chdn_SalesTaxReceivable |  |  |  |  |
Income tax receivable recorded | 100,000 us-gaap_IncomeTaxReceivable |  |  |  |  |
Unrecognized Tax Benefits | 2,926,000 us-gaap_UnrecognizedTaxBenefits | 582,000 us-gaap_UnrecognizedTaxBenefits | 8,565,000 us-gaap_UnrecognizedTaxBenefits |  |  | 2,109,000 us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 1,800,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |  |  |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit | 1,100,000 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit |  |  |  |  |
Accrued interest epense related to unrecognized income tax benefits | 200,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 200,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued |  |  |  |
Adjustment |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Reduction in operating expense | (600,000)us-gaap_OperatingExpenses / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember | (800,000)us-gaap_OperatingExpenses / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember | 700,000 us-gaap_OperatingExpenses / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
Income tax provision | (100,000)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember | (400,000)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember | 500,000 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementScenarioAxis = us-gaap_RestatementAdjustmentMember |  |  |
State |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Operating Loss Carryforwards | 4,300,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |  |  |
Operating Loss Carryforwards, Valuation Allowance | 900,000 us-gaap_OperatingLossCarryforwardsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |  |  |
Youbet.com | Federal |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Operating Loss Carryforwards | 24,400,000 us-gaap_OperatingLossCarryforwards / us-gaap_BusinessAcquisitionAxis = chdn_YoubetComMember / us-gaap_IncomeTaxAuthorityAxis = us-gaap_DomesticCountryMember |  |  |  |  |
Youbet.com | State |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Operating Loss Carryforwards | 2,400,000 us-gaap_OperatingLossCarryforwards / us-gaap_BusinessAcquisitionAxis = chdn_YoubetComMember / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |  |  |
KENTUCKY | State |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Reimbursement percentage of income and sales tax |  |  |  | 80.00%chdn_ReimbursementOfIncomeAndSalesTaxPercent / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember / us-gaap_StatementGeographicalAxis = stpr_KY |  |
ILLINOIS | State |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Income taxes paid |  |  |  |  | 2,900,000 us-gaap_IncomeTaxesPaidNet / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember / us-gaap_StatementGeographicalAxis = stpr_IL |
Big Fish Games [Member] |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |
Unrecognized Tax Benefits | $ 1,700,000 us-gaap_UnrecognizedTaxBenefits / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember |  |  |  |  |

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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