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Earnings Per Common Share Computations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |
Earnings from continuing operations | $ 46,357 us-gaap_IncomeLossFromContinuingOperations | $ 55,033 us-gaap_IncomeLossFromContinuingOperations | $ 58,152 us-gaap_IncomeLossFromContinuingOperations
Earnings from continuing operations allocated to participating securities | (267)chdn_ParticipatingSecuritiesDistributedAndUndistributedEarningsContinuingOperations | (873)chdn_ParticipatingSecuritiesDistributedAndUndistributedEarningsContinuingOperations | (518)chdn_ParticipatingSecuritiesDistributedAndUndistributedEarningsContinuingOperations
Numerator for basic earnings from continuing operations per common share | 46,090 chdn_IncomeLossFromContinuingOperationsBasic | 54,160 chdn_IncomeLossFromContinuingOperationsBasic | 57,634 chdn_IncomeLossFromContinuingOperationsBasic
Net earnings | 46,357 us-gaap_NetIncomeLoss | 54,900 us-gaap_NetIncomeLoss | 58,276 us-gaap_NetIncomeLoss
Net earnings allocated to participating securities | (267)us-gaap_DistributedEarnings | (870)us-gaap_DistributedEarnings | (519)us-gaap_DistributedEarnings
Numerator for basic net earnings per common share | $ 46,090 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 54,030 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 57,757 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Earnings Per Share, Basic and Diluted [Abstract] |  |  |
Basic | 17,271 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 17,294 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 17,047 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Plus dilutive effect of stock options (in shares) | 153 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 248 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 233 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Plus dilutive effect of participating securities (in shares) | 165 chdn_IncrementalCommonSharesAttributableToParticipatingSecurities | 396 chdn_IncrementalCommonSharesAttributableToParticipatingSecurities | 195 chdn_IncrementalCommonSharesAttributableToParticipatingSecurities
Diluted (in shares) | 17,589 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 17,938 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 17,475 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Earnings Per Share, Basic [Abstract] |  |  |
Earnings from continuing operations | $ 2.67 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 3.13 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 3.38 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Discontinued operations | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Net earnings (per basic share) | $ 2.67 us-gaap_EarningsPerShareBasic | $ 3.12 us-gaap_EarningsPerShareBasic | $ 3.39 us-gaap_EarningsPerShareBasic
Earnings Per Share, Diluted [Abstract] |  |  |
Earnings from continuing operations | $ 2.64 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 3.07 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 3.33 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Discontinued operations | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.01)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Net earnings (per share, diluted) | $ 2.64 us-gaap_EarningsPerShareDiluted | $ 3.06 us-gaap_EarningsPerShareDiluted | $ 3.34 us-gaap_EarningsPerShareDiluted

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- Definition The total amount of dividends declared in the period for each class of stock and the contractual amount of dividends (or interest on participating income bonds) that must be paid for the period (for example, unpaid cumulative dividends). Dividends declared in the current period do not include dividends declared in respect of prior-period unpaid cumulative dividends. Preferred dividends that are cumulative only if earned are deducted only to the extent that they are earned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60B -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780133-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60A -URI http://asc.fasb.org/extlink&oid=7655603&loc=SL5780132-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 60 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2740-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 66 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e2814-109256 + Details
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