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