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Supplemental Guarantor Information (Narrative) (Details)
 12 Months Ended
Nov. 30, 2014
Debt Instrument [Line Items]  
Line of credit facility, significant subsidiary threshold, percent 5.00%kbh_LineofCreditFacilitySignificantSubsidiaryThresholdPercent
Line of credit facility, non guarantor subsidiary threshold, percent 10.00%kbh_LineofCreditFacilityNonGuarantorSubsidiaryThresholdPercent
Ownership share in guarantor subsidiaries 100.00%kbh_OwnershipShareInGuarantorSubsidiaries
Revolving Credit Facility [Member]  
Debt Instrument [Line Items]  
Line of credit facility, non guarantor subsidiary threshold, percent 10.00%kbh_LineofCreditFacilityNonGuarantorSubsidiaryThresholdPercent
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember