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Goodwill (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 16, 2014 | Jul. 17, 2013
Goodwill [Roll Forward] |  |  |  |
Balance, beginning of period | $ 300,616 us-gaap_Goodwill | $ 250,414 us-gaap_Goodwill |  |
Additions | 538,904 us-gaap_GoodwillAcquiredDuringPeriod | 50,202 us-gaap_GoodwillAcquiredDuringPeriod |  |
Balance, end of period | 839,520 us-gaap_Goodwill | 300,616 us-gaap_Goodwill |  |
Racing Segment [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance, beginning of period | 51,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 51,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember |  |
Additions | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember |  |
Balance, end of period | 51,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember | 51,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_RacingSegmentMember |  |
Casino Segment |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance, beginning of period | 117,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | 67,457 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember |  |
Additions | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | 50,202 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember |  |
Balance, end of period | 117,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember | 117,659 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_CasinoSegmentMember |  |
TwinSpires [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance, beginning of period | 127,364 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | 127,364 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember |  |
Additions | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember |  |
Balance, end of period | 127,364 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember | 127,364 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_TwinSpiresMember |  |
Big Fish Games [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance, beginning of period | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember |  |
Additions | 538,904 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember |  |
Balance, end of period | 538,904 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_BigFishGamesMember |  |
Other Investments |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Balance, beginning of period | 3,934 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember | 3,934 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember |  |
Additions | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember |  |
Balance, end of period | 3,934 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember | 3,934 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = chdn_OtherInvestmentsSegmentMember |  |
Big Fish Games [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 538,900 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = chdn_BigFishGamesMember |  | 538,904 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = chdn_BigFishGamesMember |
Oxford Acquisition [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  | $ 50,200 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = chdn_OxfordAcquisitionMember |  | $ 50,202 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = chdn_OxfordAcquisitionMember

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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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