Document and Entity Information - May. 31, 2015 - shares	Total
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	ISCA
Entity Registrant Name	INTERNATIONAL SPEEDWAY CORP
Entity Central Index Key	0000051548
Current Fiscal Year End Date	--11-30
Entity Filer Category	Large Accelerated Filer
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	26,720,322
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	19,921,776