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Supplemental Guarantor Information (Details 2) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Feb. 29, 2012 | Feb. 28, 2011
Cash flows from operating activities: |  |
Net loss | $ (45,802) | $ (114,526)
Adjustments to reconcile net loss to net cash used by operating activities: |  |
Equity in (income) loss of unconsolidated joint ventures | (70) | 55,987
Loss on loan guaranty |  | 22,758
Gain on sale of operating property |  | (8,825)
Inventory impairments and land option contract abandonments | 6,572 | 1,754
Change in assets and liabilities: |  |
Receivables | 18,293 | 4,627
Inventories | (25,856) | (64,940)
Accounts payable, accrued expenses and other liabilities | (60,621) | (55,472)
Other, net | (2,100) | (6,262)
Net cash used by operating activities | (109,584) | (164,899)
Cash flows from investing activities: |  |
Return of investment in (contributions to) unconsolidated joint ventures | 6,547 | (611)
Proceeds from sale of operating property |  | 80,600
Purchases of property and equipment, net | (429) | (74)
Net cash provided by investing activities | 6,118 | 79,915
Cash flows from financing activities: |  |
Change in restricted cash | 591 | (5,710)
Proceeds from issuance of senior notes | 344,831 |
Payment of senior notes issuance costs | (5,816) |
Repayment of senior notes | (340,481) |
Payments on mortgages and land contracts due to land sellers and other loans | (1,715) | (70,501)
Issuance of common stock under employee stock plans | 175 | 69
Payments of cash dividends | (4,818) | (4,806)
Net cash used by financing activities | (7,233) | (80,948)
Net decrease in cash and cash equivalents | (110,699) | (165,932)
Cash and cash equivalents at beginning of period | 418,074 | 908,430
Cash and cash equivalents at end of period | 307,375 | 742,498
Supplemental Guarantor Information (Textual) [Abstract] |  |
Ownership share in guarantor subsidiaries | 100.00% |
KB Home Corporate [Member] |  |
Cash flows from operating activities: |  |
Net loss | (45,802) | (114,526)
Change in assets and liabilities: |  |
Receivables | (19) | 307
Accounts payable, accrued expenses and other liabilities | (9,889) | (12,135)
Other, net | (5,390) | (4,259)
Net cash used by operating activities | (61,100) | (130,613)
Cash flows from investing activities: |  |
Purchases of property and equipment, net | (21) | (240)
Net cash provided by investing activities | (21) | (240)
Cash flows from financing activities: |  |
Change in restricted cash | 591 | (5,710)
Proceeds from issuance of senior notes | 344,831 |
Payment of senior notes issuance costs | (5,816) |
Repayment of senior notes | (340,481) |
Issuance of common stock under employee stock plans | 175 | 69
Payments of cash dividends | (4,818) | (4,806)
Intercompany | (14,899) | (18,352)
Net cash used by financing activities | (20,417) | (28,799)
Net decrease in cash and cash equivalents | (81,538) | (159,652)
Cash and cash equivalents at beginning of period | 340,957 | 770,603
Cash and cash equivalents at end of period | 259,419 | 610,951
Guarantor Subsidiaries [Member] |  |
Cash flows from operating activities: |  |
Net loss | (33,897) | (4,591)
Adjustments to reconcile net loss to net cash used by operating activities: |  |
Equity in (income) loss of unconsolidated joint ventures | 51 | 43
Gain on sale of operating property |  | (8,825)
Inventory impairments and land option contract abandonments | 6,572 | 112
Change in assets and liabilities: |  |
Receivables | (2,119) | (743)
Inventories | (12,997) | (15,946)
Accounts payable, accrued expenses and other liabilities | (31,936) | (11,222)
Other, net | 189 | (3,160)
Net cash used by operating activities | (74,137) | (44,332)
Cash flows from investing activities: |  |
Return of investment in (contributions to) unconsolidated joint ventures | 6,549 | (101)
Proceeds from sale of operating property |  | 80,600
Purchases of property and equipment, net | (149) | (18)
Net cash provided by investing activities | 6,400 | 80,481
Cash flows from financing activities: |  |
Payments on mortgages and land contracts due to land sellers and other loans | (1,644) | (70,501)
Intercompany | 60,890 | 34,114
Net cash used by financing activities | 59,246 | (36,387)
Net decrease in cash and cash equivalents | (8,491) | (238)
Cash and cash equivalents at beginning of period | 32,876 | 3,619
Cash and cash equivalents at end of period | 24,385 | 3,381
Non-Guarantor Subsidiaries [Member] |  |
Cash flows from operating activities: |  |
Net loss | (12,150) | (101,428)
Adjustments to reconcile net loss to net cash used by operating activities: |  |
Equity in (income) loss of unconsolidated joint ventures | (121) | 55,944
Loss on loan guaranty |  | 22,758
Inventory impairments and land option contract abandonments |  | 1,642
Change in assets and liabilities: |  |
Receivables | 20,431 | 5,063
Inventories | (12,859) | (48,994)
Accounts payable, accrued expenses and other liabilities | (18,796) | (32,115)
Other, net | 3,101 | 1,157
Net cash used by operating activities | (20,394) | (95,973)
Cash flows from investing activities: |  |
Return of investment in (contributions to) unconsolidated joint ventures | (2) | (510)
Purchases of property and equipment, net | (259) | 184
Net cash provided by investing activities | (261) | (326)
Cash flows from financing activities: |  |
Payments on mortgages and land contracts due to land sellers and other loans | (71) |
Intercompany | 56 | 90,257
Net cash used by financing activities | (15) | 90,257
Net decrease in cash and cash equivalents | (20,670) | (6,042)
Cash and cash equivalents at beginning of period | 44,241 | 134,208
Cash and cash equivalents at end of period | 23,571 | 128,166
Consolidating Adjustments [Member] |  |
Cash flows from operating activities: |  |
Net loss | 46,047 | 106,019
Change in assets and liabilities: |  |
Net cash used by operating activities | 46,047 | 106,019
Cash flows from financing activities: |  |
Intercompany | (46,047) | (106,019)
Net cash used by financing activities | $ (46,047) | $ (106,019)

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- Definition Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition The net cash outflow or inflow from purchases, sales and disposals of property, plant and equipment and other productive assets, including intangibles. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 + Details
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- Definition The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 + Details
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- Definition The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 19 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The net cash inflow or outflow from cash and cash items that are not available for withdrawal or usage. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3255-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The net cash inflow or outflow associated with long-term debt that is wholly or partially secured by collateral. Excludes proceeds from and repayments of tax exempt secured debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 + Details
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- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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