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v3.21.1

Variable Interest Entities (Details) $ in Thousands | Feb. 28, 2021 USD ($) joint_venture | Nov. 30, 2020 USD ($) joint_venture
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Variable Interest Entity [Line Items] |  |
Number of investments in unconsolidated joint ventures | joint_venture | 5 | 5
Cash Deposits | $ 65,932 | $ 54,634
Aggregate Purchase Price | 1,569,443 | 1,418,429
Pre-acquisition costs related to land option contracts and other similar contracts | 35,400 | 31,100
Increase in inventories and accrued expenses and other liabilities | $ 17,600 | $ 19,400
Variable Interest Entity, Not Primary Beneficiary [Member] |  |
Variable Interest Entity [Line Items] |  |
Number of investments in unconsolidated joint ventures | joint_venture | 1 | 1
Cash Deposits | $ 23,239 | $ 20,962
Aggregate Purchase Price | 845,229 | 910,495
Non-VIE Land Option Contracts And Other Similar Contracts [Member] |  |
Variable Interest Entity [Line Items] |  |
Cash Deposits | 42,693 | 33,672
Aggregate Purchase Price | $ 724,214 | $ 507,934

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- Definition Acquisition costs related to land option contracts and 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

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- Definition Aggregate purchase price associated with 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
Period Type: | instant

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

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- 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
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- Definition Number of investments in unconsolidated joint ventures. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |