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Fair Value Disclosures (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Feb. 29, 2012	Nov. 30, 2011
Assets measured at fair value on a nonrecurring basis
Long-lived assets held and used	$ 12,239	$ 34,022
Level 2 [Member]
Assets measured at fair value on a nonrecurring basis
Long-lived assets held and used		75
Level 3 [Member]
Assets measured at fair value on a nonrecurring basis
Long-lived assets held and used	$ 12,239	$ 33,947

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- Definition

Long lived assets held and used fair value disclosure.

+ References

No definition available.

+ Details

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Namespace Prefix:	kbh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration