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Stockholders' Equity (Narratives) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Feb. 28, 2015 | Feb. 28, 2014 | Nov. 30, 2014 | Jul. 17, 2014
Equity [Abstract] |  |  |  |
Dividend paid in each quarter (in dollars per share) | $ 0.0250 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.0250 us-gaap_CommonStockDividendsPerShareCashPaid |  |
Debt Instrument [Line Items] |  |  |  |
Number of common stock, authorized, approved under a board approved stock repurchase program | 4,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased |  |  |
Common stock reserve, shares | 12,602,735 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |  |  |
Treasury Stock, Value | $ 446,497 us-gaap_TreasuryStockValue |  | $ 446,476 us-gaap_TreasuryStockValue |
Director Stock Units [Domain] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Number of common stock, authorized, approved under a board approved stock repurchase program |  |  |  | 680,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_PlanNameAxis = kbh_DirectorStockUnitsDomain

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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- Definition The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 + Details
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