Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
REVENUES:
Admissions, net	$ 129,688us-gaap_AdmissionsRevenue	$ 129,824us-gaap_AdmissionsRevenue	$ 136,099us-gaap_AdmissionsRevenue
Motorsports related	433,738isca_MotorsportsRelatedRevenue	425,530isca_MotorsportsRelatedRevenue	416,699isca_MotorsportsRelatedRevenue
Food, beverage and merchandise	72,880us-gaap_FoodAndBeverageRevenue	44,046us-gaap_FoodAndBeverageRevenue	45,985us-gaap_FoodAndBeverageRevenue
Other	15,630us-gaap_OtherSalesRevenueNet	13,240us-gaap_OtherSalesRevenueNet	13,584us-gaap_OtherSalesRevenueNet
Total revenue	651,936us-gaap_SalesRevenueNet	612,640us-gaap_SalesRevenueNet	612,367us-gaap_SalesRevenueNet
Direct:
Prize and point fund monies and NASCAR sanction fees	162,988	159,349	154,673
Motorsports related	128,229isca_MotorsportsRelatedExpense	125,928isca_MotorsportsRelatedExpense	125,072isca_MotorsportsRelatedExpense
Food, beverage and merchandise	58,265us-gaap_FoodAndBeverageCostOfSales	33,150us-gaap_FoodAndBeverageCostOfSales	35,642us-gaap_FoodAndBeverageCostOfSales
General and administrative	108,563us-gaap_GeneralAndAdministrativeExpense	104,925us-gaap_GeneralAndAdministrativeExpense	102,958us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization	90,352us-gaap_DepreciationAndAmortization	93,989us-gaap_DepreciationAndAmortization	77,870us-gaap_DepreciationAndAmortization
Losses on retirements of long-lived assets	10,148us-gaap_AssetImpairmentCharges	16,607us-gaap_AssetImpairmentCharges	11,143us-gaap_AssetImpairmentCharges
Total expenses	558,545us-gaap_CostsAndExpenses	533,948us-gaap_CostsAndExpenses	507,358us-gaap_CostsAndExpenses
Operating income	93,391us-gaap_OperatingIncomeLoss	78,692us-gaap_OperatingIncomeLoss	105,009us-gaap_OperatingIncomeLoss
Interest income	2,107us-gaap_InvestmentIncomeInterest	96us-gaap_InvestmentIncomeInterest	102us-gaap_InvestmentIncomeInterest
Interest expense	(9,182)us-gaap_InterestExpense	(15,221)us-gaap_InterestExpense	(13,501)us-gaap_InterestExpense
Loss on early redemption of debt	0	0	(9,144)
Other	5,380us-gaap_OtherNonoperatingIncome	75us-gaap_OtherNonoperatingIncome	1,008us-gaap_OtherNonoperatingIncome
Equity in net income from equity investments	8,916	9,434	2,757
Income before income taxes	100,612	73,076	86,231
Income taxes	33,233us-gaap_IncomeTaxExpenseBenefit	27,784us-gaap_IncomeTaxExpenseBenefit	31,653us-gaap_IncomeTaxExpenseBenefit
Net income	$ 67,379us-gaap_NetIncomeLoss	$ 45,292us-gaap_NetIncomeLoss	$ 54,578us-gaap_NetIncomeLoss
Earnings per share:
Basic and diluted	$ 1.45	$ 0.97	$ 1.18
Dividends per share	$ 0.24	$ 0.22	$ 0.20
Basic weighted average shares outstanding	46,559,232	46,470,647	46,386,355
Diluted weighted average shares outstanding	46,573,038	46,486,561	46,396,631

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