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Basis Of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Variable Interest Entity [Line Items] |  |  |
Debt Issuance Cost |  | $ 6,300,000 us-gaap_DebtIssuanceCosts |
Restricted cash | 26,065,000 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue | 36,074,000 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue |
Equity Method Investment, Ownership Percentage | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage |  |
Deferred Finance Costs, Gross | 1,100,000 us-gaap_DeferredFinanceCostsGross | 2,300,000 us-gaap_DeferredFinanceCostsGross | 100,000 us-gaap_DeferredFinanceCostsGross
Advertising Expense | 9,900,000 us-gaap_AdvertisingExpense | 9,500,000 us-gaap_AdvertisingExpense | 6,900,000 us-gaap_AdvertisingExpense
Advanced Sales of Personal Seat Licenses, Contractual Life, Term One | 1 year |  |
Advanced Sales of Personal Seat Licenses, Contractual Life, Term Two | 2 years |  |
Advanced Sales of Personal Seat Licenses, Contractual Life, Term Three | 3 years |  |
Advanced Sales of Personal Seat Licenses, Contractual Life, Term Four | 5 years |  |
Advanced Sales of Personal Seat Licenses, Contractual Life, Term Five | 30 years |  |
HRE Trust Fund |  |  |
Variable Interest Entity [Line Items] |  |  |
Restricted cash |  | $ 8,800,000 us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue / us-gaap_LitigationCaseAxis = chdn_HreTrustFundMember |
Minimum |  |  |
Variable Interest Entity [Line Items] |  |  |
Pari-Mutuel Tax Rate | 0.50%chdn_PariMutuelTaxRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Gaming Tax Rate | 1.50%chdn_GamingTaxRate / us-gaap_RangeAxis = us-gaap_MinimumMember |  |
Maximum [Member] |  |  |
Variable Interest Entity [Line Items] |  |  |
Pari-Mutuel Tax Rate | 10.00%chdn_PariMutuelTaxRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Gaming Tax Rate | 46.00%chdn_GamingTaxRate / us-gaap_RangeAxis = us-gaap_MaximumMember |  |

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- Definition The Company recognizes gaming tax expense based on the statutorily required percentage of revenue that is required to be paid to state and local jurisdictions in the states in which wagering occurs. Individual states and local jurisdictions set gaming tax rates. + References No definition available. + Details
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- Definition The Company recognizes pari-mutuel expense based on the statutorily required percentage of revenue that is required to be paid to state and local jurisdictions in the states in which wagering occurs. Individual states and local jurisdictions set pari-mutuel tax rates. + References No definition available. + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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