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Segment Information - Equity in Earnings (Losses) of Unconsolidated Investments (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Equity in (gains) losses of unconsolidated investments | $ 6,328 us-gaap_IncomeLossFromEquityMethodInvestments | $ (4,142)us-gaap_IncomeLossFromEquityMethodInvestments | $ (1,701)us-gaap_IncomeLossFromEquityMethodInvestments
Casino Segment |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Equity in (gains) losses of unconsolidated investments | 8,900 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | (3,718)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | (610)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember
TwinSpires [Member] |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Equity in (gains) losses of unconsolidated investments | (68)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | (848)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | (1,413)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember
Other Investments |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Equity in (gains) losses of unconsolidated investments | $ (2,504)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember | $ 424 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember | $ 322 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember

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- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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