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Acquisitions And New Ventures Acquisitions And New Ventures - Pro Forma Information (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Acquisitions and New Ventures [Abstract] |  |
Business Acquisition, Non-recurring Acquisition Costs |  | $ 23,100,000 chdn_BusinessAcquisitionNonrecurringAcquisitionCosts
Business Acquisition, Pro Forma Information [Abstract] |  |
Net revenues | 1,126,592,000 us-gaap_BusinessAcquisitionsProFormaRevenue | 1,085,518,000 us-gaap_BusinessAcquisitionsProFormaRevenue
Earnings from continuing operations | $ 64,145,000 us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax | $ 11,182,000 us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax

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- Definition Business Acquisition, Non-recurring Acquisition Costs + References No definition available. + Details
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- Definition The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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