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v2.4.1.9

Shareholders Equity (Details) (USD $) | 0 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 13, 2008 firm | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Apr. 23, 2013
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 100,000,000 us-gaap_StockRepurchaseProgramAuthorizedAmount1
Number of investment banking firms consulting with company | 1 chdn_ClassOfWarrantOrRightTriggerEventRepurchaseNumberOfConsultingBanks |  |  |  |
Percent of common stock issued | 200.00%chdn_ClassOfWarrantOrRightValueCommonStockIssuedAsPercentOrExercisePrice |  |  |  |
Maximum percentage of companies assets, cash flow or earnings power before shareholders will lose right to exercise shares | 50.00%chdn_ClassOfWarrantOrRightTriggeringEventRepurchaseReductionInQualifyingAccountsEarningsOrCashFlows |  |  |  |
Class of Warrant or Right, Triggering Event, Repurchase, Beneficial Owner, Percentage | 50.00%chdn_ClassOfWarrantOrRightTriggeringEventRepurchaseBeneficialOwnerPercentage |  |  |  |
Stock Repurchased During Period, Shares |  | 691,000 us-gaap_StockRepurchasedDuringPeriodShares |  |  |
Stock Repurchased and Retired During Period, Value |  | 61,561,000 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | 0 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue | 0 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 38,400,000 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 |  |  |
Preferred Stock |  |  |  |  |
Conversion of Stock, Shares Issued | 0.0001 us-gaap_ConversionOfStockSharesIssued1 / us-gaap_StatementClassOfStockAxis = us-gaap_PreferredStockMember |  |  |  |
Minimum |  |  |  |  |
Beneficial ownership percentage | 15.00%chdn_ClassOfWarrantOrRightTriggeringEventIssuanceBeneficialOwnerPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |
Common Stock | Common Stock |  |  |  |  |
Class or Warrant or Right, Percent of Common Stock Issued | 200.00%chdn_ClassOrWarrantOrRightPercentOfCommonStockIssued / us-gaap_ClassOfWarrantOrRightAxis = us-gaap_CommonStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |
Class of Warrant or Right, Repurchase Rate | 1 chdn_ClassOfWarrantOrRightRepurchaseRate / us-gaap_ClassOfWarrantOrRightAxis = us-gaap_CommonStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |
Series A Preferred Stock [Member] | Common Stock |  |  |  |  |
Class of Warrant or Right, Issuance Rate | 1 chdn_ClassOfWarrantOrRightIssuanceRate / us-gaap_ClassOfWarrantOrRightAxis = us-gaap_SeriesAPreferredStockMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |

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- Definition Number Of Investment Banking Firms Consulting With Company + References No definition available. + Details
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- Definition Class of Warrant or Right, Triggering Event, Repurchase, Beneficial Owner, Percentage + References No definition available. + Details
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- Definition Class of Warrant or Right, Triggering Event, Repurchase, Reduction in Qualifying Accounts, Earnings or Cash Flows + References No definition available. + Details
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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