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Natural Disasters (Details) (USD $) | 12 Months Ended | 0 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Feb. 24, 2011 | Dec. 31, 2011 | May 12, 2011 seats
Business Interruption Loss [Line Items] |  |  |  |  |  |
Unusual or Infrequent Item, Net of Insurance Proceeds | $ (431,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds | $ (375,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds | $ (7,006,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds |  |  |
Casualty Losses | 0 chdn_CasualtyLosses | 0 chdn_CasualtyLosses | 12,975,000 chdn_CasualtyLosses |  |  |
Insurance Recoveries | (431,000)us-gaap_InsuranceRecoveries | (375,000)us-gaap_InsuranceRecoveries | (19,981,000)us-gaap_InsuranceRecoveries |  |  |
Casino Segment |  |  |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |  |  |
Unusual or Infrequent Item, Net of Insurance Proceeds |  |  | (6,525,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember |  |  |
Casualty Losses |  |  | 12,331,000 chdn_CasualtyLosses / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember |  |  |
Insurance Recoveries |  |  | (18,856,000)us-gaap_InsuranceRecoveries / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember |  |  |
Racing Segment [Member] |  |  |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |  |  |
Unusual or Infrequent Item, Net of Insurance Proceeds | (431,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | (375,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | (481,000)us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember |  |  |
Casualty Losses | 0 chdn_CasualtyLosses / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 0 chdn_CasualtyLosses / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 644,000 chdn_CasualtyLosses / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember |  |  |
Insurance Recoveries | (431,000)us-gaap_InsuranceRecoveries / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | (375,000)us-gaap_InsuranceRecoveries / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | (1,125,000)us-gaap_InsuranceRecoveries / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember |  |  |
Churchill Downs | Hail |  |  |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |  |  |
Insurance Deductible | 500,000 chdn_InsuranceDeductible / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember |  |  |  |  |
Reduction To Property And Equipment Due To Natural Disaster |  |  | 600,000 chdn_ReductionToPropertyAndEquipmentDueToNaturalDisaster / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember |  |  |
Insurance Settlements Received | 400,000 chdn_InsuranceSettlementsCashSettlementReceived / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember | 400,000 chdn_InsuranceSettlementsCashSettlementReceived / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember | 1,100,000 chdn_InsuranceSettlementsCashSettlementReceived / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember |  |  |
Unusual or Infrequent Item, Net of Insurance Proceeds | 400,000 us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember | 400,000 us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember | 500,000 us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_BusinessInterruptionLossAxis = chdn_HailMember / chdn_CasinoByLocationAxis = chdn_ChurchillDownsMember |  |  |
Harlows Casino |  |  |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |  |  |
Number Of Hotels Rooms Damaged |  |  |  | 61 chdn_NumberOfHotelsRoomsDamaged / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |
Harlows Casino | Wind |  |  |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |  |  |
Insurance Deductible | 100,000 chdn_InsuranceDeductible / us-gaap_BusinessInterruptionLossAxis = chdn_WindMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |  |  |
Reduction To Property And Equipment Due To Natural Disaster |  |  | 1,400,000 chdn_ReductionToPropertyAndEquipmentDueToNaturalDisaster / us-gaap_BusinessInterruptionLossAxis = chdn_WindMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |
Repair expenditures |  |  | 400,000 us-gaap_CostOfPropertyRepairsAndMaintenance / us-gaap_BusinessInterruptionLossAxis = chdn_WindMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |
Insurance Settlements Received |  | 3,400,000 chdn_InsuranceSettlementsCashSettlementReceived / us-gaap_BusinessInterruptionLossAxis = chdn_WindMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |  |
Unusual or Infrequent Item, Net of Insurance Proceeds |  |  | 1,500,000 us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_BusinessInterruptionLossAxis = chdn_WindMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |
Preliminary Claim For Damages Incurred |  |  |  | 1,000,000 chdn_PreliminaryClaimForDamagesIncurred / us-gaap_BusinessInterruptionLossAxis = chdn_WindMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |
Harlows Casino | Flood |  |  |  |  |  |
Business Interruption Loss [Line Items] |  |  |  |  |  |
Number Of Seats In Entertainment Center |  |  |  |  |  | 2,600 chdn_NumberOfSeatsInEntertainmentCenter / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember
Insurance Deductible | 1,300,000 chdn_InsuranceDeductible / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |  |  |
Reduction To Property And Equipment Due To Natural Disaster |  |  | 8,500,000 chdn_ReductionToPropertyAndEquipmentDueToNaturalDisaster / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |
Repair expenditures |  |  | 2,000,000 us-gaap_CostOfPropertyRepairsAndMaintenance / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |
Insurance Settlements, Partial Settlement Received |  |  |  |  | 3,500,000 chdn_InsuranceSettlementsPartialSettlementReceived / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |
Insurance Settlements Received |  | 12,000,000 chdn_InsuranceSettlementsCashSettlementReceived / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |  |
Unusual or Infrequent Item, Net of Insurance Proceeds |  |  | $ 5,000,000 us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds / us-gaap_BusinessInterruptionLossAxis = us-gaap_FloodMember / chdn_CasinoByLocationAxis = chdn_HarlowsCasinoMember |  |  |

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