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PROPERTY AND EQUIPMENT - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2012
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 90.2us-gaap_Depreciation $ 94.0us-gaap_Depreciation $ 77.8us-gaap_Depreciation
Daytona Rising      
Property, Plant and Equipment [Line Items]      
Depreciation expense $ 11.1us-gaap_Depreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= isca_DaytonaRisingMember
$ 15.4us-gaap_Depreciation
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= isca_DaytonaRisingMember