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Calder Racing Operations (Details) $ in Millions | 3 Months Ended
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Jun. 30, 2015 USD ($)
Calder Racing [Abstract] |
Restructuring and Related Cost, Accelerated Depreciation | $ 2.4
Demolition Expense | $ 0.8

X
- Definition Calder Racing [Abstract] + References No definition available. + Details
Name: | chdn_CalderRacingAbstract
Namespace Prefix: | chdn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount associated with the demolition of assets + References No definition available. + Details
Name: | chdn_DemolitionExpense
Namespace Prefix: | chdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of accelerated depreciation charged against earnings associated with exit from or disposal of business activities or restructuring plan. + References No definition available. + Details
Name: | us-gaap_RestructuringReserveAcceleratedDepreciation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration