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Income Taxes Income Taxes - Income Tax Reconcilation (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Federal statutory tax on earnings before income taxes | $ 26,782 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 29,928 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 31,929 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
State income taxes, net of federal income tax benefit | 1,388 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 1,514 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 2,185 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Non-deductible lobbying and contributions | 999 chdn_IncomeTaxReconcilationDeductionsNonDeductibleLobbyingAndContributions | 723 chdn_IncomeTaxReconcilationDeductionsNonDeductibleLobbyingAndContributions | 946 chdn_IncomeTaxReconcilationDeductionsNonDeductibleLobbyingAndContributions
Tax credits and incentives | (1,209)us-gaap_IncomeTaxReconciliationTaxCredits | (663)us-gaap_IncomeTaxReconciliationTaxCredits | (494)us-gaap_IncomeTaxReconciliationTaxCredits
Tax adjustments | (485)chdn_IncomeTaxReconciliationDeductionsTaxAdjustments | (174)chdn_IncomeTaxReconciliationDeductionsTaxAdjustments | (1,093)chdn_IncomeTaxReconciliationDeductionsTaxAdjustments
Accruals and settlements related to tax audits | 529 us-gaap_IncomeTaxReconciliationTaxSettlements | (395)us-gaap_IncomeTaxReconciliationTaxSettlements | (686)us-gaap_IncomeTaxReconciliationTaxSettlements
Valuation allowance | 0 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (220)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 0 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Change in effective state tax rates | (401)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | (383)us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate | 197 us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate
Income Tax Reconcilation, Deductions, Non-deductible Transaction Costs | 947 chdn_IncomeTaxReconcilationDeductionsNondeductibleTransactionCosts | 0 chdn_IncomeTaxReconcilationDeductionsNondeductibleTransactionCosts | 0 chdn_IncomeTaxReconcilationDeductionsNondeductibleTransactionCosts
Income Tax Reconcilation, Deductions, Non-deductible Acquisition Related Charges | 1,339 chdn_IncomeTaxReconcilationDeductionsNondeductibleAcquisitionRelatedCharges | 0 chdn_IncomeTaxReconcilationDeductionsNondeductibleAcquisitionRelatedCharges | 0 chdn_IncomeTaxReconcilationDeductionsNondeductibleAcquisitionRelatedCharges
Other permanent differences | 272 us-gaap_IncomeTaxReconciliationOtherAdjustments | 143 us-gaap_IncomeTaxReconciliationOtherAdjustments | 91 us-gaap_IncomeTaxReconciliationOtherAdjustments
Income Tax Expense (Benefit), Continuing Operations | $ 30,161 us-gaap_IncomeTaxExpenseBenefit | $ 30,473 us-gaap_IncomeTaxExpenseBenefit | $ 33,075 us-gaap_IncomeTaxExpenseBenefit

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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