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Basis Of Presentation and Summary of Significant Accounting Policies - Promotional Allowance (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Promotional Allowance [Line Items] |  |  |
Customer Loyalty Program Liability, Current | $ 1,731,863 us-gaap_CustomerLoyaltyProgramLiabilityCurrent | $ 2,102,442 us-gaap_CustomerLoyaltyProgramLiabilityCurrent |
Promotional allowances | 32,500,000 us-gaap_PromotionalAllowances | 33,000,000 us-gaap_PromotionalAllowances | 21,500,000 us-gaap_PromotionalAllowances
Estimated cost of providing promotional allowances | 9,100,000 chdn_EstimatedCostOfProvidingPromotionalAllowances | 9,500,000 chdn_EstimatedCostOfProvidingPromotionalAllowances | 5,700,000 chdn_EstimatedCostOfProvidingPromotionalAllowances
Racing Segment [Member] |  |  |
Promotional Allowance [Line Items] |  |  |
Promotional allowances | 700,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 900,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 1,000,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember
TwinSpires [Member] |  |  |
Promotional Allowance [Line Items] |  |  |
Promotional allowances | 12,500,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | 12,300,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | 9,300,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember
Casino Segment |  |  |
Promotional Allowance [Line Items] |  |  |
Promotional allowances | $ 19,200,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | $ 19,800,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | $ 11,200,000 us-gaap_PromotionalAllowances / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember

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- Definition Estimated Cost Of Providing Promotional Allowances + References No definition available. + Details
Name: | chdn_EstimatedCostOfProvidingPromotionalAllowances
Namespace Prefix: | chdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | chdn_PromotionalAllowanceLineItems
Namespace Prefix: | chdn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Value of deferred revenue or cost to provide products or services, which is expected to be recognized in income or incurred within one year or the normal operating cycle, if longer, resulting from customer loyalty program. Excludes liability associated with frequent flier programs. Includes liability associated with customer loyalty programs for other businesses, for example, but is not limited to, hotels, supermarkets, credit card companies, automobile rental companies, and book sellers. + References No definition available. + Details
Name: | us-gaap_CustomerLoyaltyProgramLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition This element represents the estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 605 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6472957&loc=d3e51325-107943 + Details
Name: | us-gaap_PromotionalAllowances
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=chdn_CasinoSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=chdn_RacingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=chdn_TwinSpiresMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |