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Variable Interest Entities (Details) (USD $) | Aug. 31, 2013 | Nov. 30, 2012
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Cash Deposits | $ 44,043,000 | $ 25,682,000
Aggregate Purchase Price | 825,027,000 | 625,335,000
Pre-acquisition costs related to land option contracts and other similar contracts | 27,100,000 | 25,400,000
Outstanding letters of credit | 100,000 | 500,000
Increase in inventories and accrued expenses and other liabilities | 8,900,000 | 4,100,000
Variable Interest Entity, Not Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Cash Deposits | 15,359,000 | 8,463,000
Aggregate Purchase Price | 488,635,000 | 327,196,000
Non-VIE Other land option contracts and other similar contracts [Member] |  |
Variable Interest Entity [Line Items] |  |
Cash Deposits | 28,684,000 | 17,219,000
Aggregate Purchase Price | $ 336,392,000 | $ 298,139,000

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- Definition Acquisition costs related to land option contracts and other similar contracts. + References No definition available. + Details
Name: | kbh_AcquisitionCostsRelatedToLandOptionContractsAndOtherSimilarContracts
Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Aggregate purchase price associated with land option and other similar contracts. + References No definition available. + Details
Name: | kbh_AggregatePurchasePriceAssociatedWithLandOptionAndOtherSimilarContracts
Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Cash deposits on land option and other similar contracts. + References No definition available. + Details
Name: | kbh_CashDepositsOnLandOptionAndOtherSimilarContracts
Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Increase in inventories and accrued expenses and other liabilities due to land option and other similar contracts. + References No definition available. + Details
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Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Outstanding letters of credit in lieu of cash deposits under certain land option or other similar contracts. + References No definition available. + Details
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Namespace Prefix: | kbh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
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