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Supplemental Guarantor Information (Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands | Feb. 28, 2018 | Nov. 30, 2017 | Feb. 28, 2017 | Nov. 30, 2016
--- | --- | --- | --- | ---
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | $ 560,806 | $ 720,861 | $ 352,450 | $ 593,000
Receivables |  | 250,472 | 244,213 |  |
Inventory, Operative Builders |  | 3,441,574 | 3,263,386 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 68,176 | 64,794 |  |
Deferred tax assets, net |  | 516,569 | 633,637 |  |
Other assets |  | 108,498 | 102,498 |  |
Investments in and Advances to Affiliates, Amount of Equity |  | 0 | 0 |  |
Total assets |  | 4,957,101 | 5,041,515 |  |
Due from Affiliates |  | 0 | 0 |  |
Liabilities and stockholders' equity |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  | 743,912 | 789,393 |  |
Mortgages and notes payable |  | 2,359,570 | 2,324,845 |  |
Financial services |  | 897 | 966 |  |
Due to Affiliate |  | 0 | 0 |  |
Stockholders' equity |  | 1,852,722 | 1,926,311 |  |
Total liabilities and stockholders’ equity |  | 4,957,101 | 5,041,515 |  |
KB Home Corporate |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 455,629 | 575,193 | 257,656 | 463,100
Receivables |  | 4,309 | 24,815 |  |
Inventory, Operative Builders |  | 0 | 0 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 0 | 0 |  |
Deferred tax assets, net |  | 206,206 | 250,747 |  |
Other assets |  | 97,950 | 91,592 |  |
Investments in and Advances to Affiliates, Amount of Equity |  | 84,467 | 49,776 |  |
Total assets |  | 4,309,607 | 4,406,360 |  |
Due from Affiliates |  | 3,461,046 | 3,414,237 |  |
Liabilities and stockholders' equity |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  | 136,816 | 163,984 |  |
Mortgages and notes payable |  | 2,290,922 | 2,289,532 |  |
Financial services |  | 0 | 0 |  |
Due to Affiliate |  | 29,147 | 26,533 |  |
Stockholders' equity |  | 1,852,722 | 1,926,311 |  |
Total liabilities and stockholders’ equity |  | 4,309,607 | 4,406,360 |  |
Guarantor Subsidiaries |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 72,731 | 102,661 | 83,677 | 100,439
Receivables |  | 170,217 | 144,076 |  |
Inventory, Operative Builders |  | 3,100,304 | 2,929,466 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 65,672 | 62,290 |  |
Deferred tax assets, net |  | 195,606 | 243,523 |  |
Other assets |  | 8,109 | 8,424 |  |
Investments in and Advances to Affiliates, Amount of Equity |  | 0 | 0 |  |
Total assets |  | 3,612,639 | 3,490,440 |  |
Due from Affiliates |  | 0 | 0 |  |
Liabilities and stockholders' equity |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  | 364,322 | 371,909 |  |
Mortgages and notes payable |  | 43,541 | 9,283 |  |
Financial services |  | 0 | 0 |  |
Due to Affiliate |  | 3,175,070 | 3,109,248 |  |
Stockholders' equity |  | 29,706 | 0 |  |
Total liabilities and stockholders’ equity |  | 3,612,639 | 3,490,440 |  |
Non-Guarantor Subsidiaries |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 32,446 | 43,007 | 11,117 | 29,461
Receivables |  | 75,946 | 75,322 |  |
Inventory, Operative Builders |  | 341,270 | 333,920 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 2,504 | 2,504 |  |
Deferred tax assets, net |  | 114,757 | 139,367 |  |
Other assets |  | 2,439 | 2,482 |  |
Investments in and Advances to Affiliates, Amount of Equity |  | 0 | 0 |  |
Total assets |  | 701,163 | 716,720 |  |
Due from Affiliates |  | 120,795 | 107,992 |  |
Liabilities and stockholders' equity |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  | 242,774 | 253,500 |  |
Mortgages and notes payable |  | 25,107 | 26,030 |  |
Financial services |  | 897 | 966 |  |
Due to Affiliate |  | 377,624 | 386,448 |  |
Stockholders' equity |  | 54,761 | 49,776 |  |
Total liabilities and stockholders’ equity |  | 701,163 | 716,720 |  |
Homebuilding [Member] |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 560,255 | 720,630 | 351,880 |
Total assets |  | 4,945,544 | 5,029,158 |  |
Liabilities and stockholders' equity |  |  |  |  |
Total Liabilities Homebuilding |  | 3,103,482 | 3,114,238 |  |
Homebuilding [Member] | KB Home Corporate |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 455,629 | 575,193 |  |
Total assets |  | 764,094 | 942,347 |  |
Liabilities and stockholders' equity |  |  |  |  |
Total Liabilities Homebuilding |  | 2,427,738 | 2,453,516 |  |
Homebuilding [Member] | Guarantor Subsidiaries |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 72,731 | 102,661 |  |
Total assets |  | 3,612,639 | 3,490,440 |  |
Liabilities and stockholders' equity |  |  |  |  |
Total Liabilities Homebuilding |  | 407,863 | 381,192 |  |
Homebuilding [Member] | Non-Guarantor Subsidiaries |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 31,895 | 42,776 |  |
Total assets |  | 568,811 | 596,371 |  |
Liabilities and stockholders' equity |  |  |  |  |
Total Liabilities Homebuilding |  | 267,881 | 279,530 |  |
Financial services [Member] |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 551 | 231 | 570 |
Receivables |  | 1,489 | 1,724 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures | [1] | 9,460 | 10,340 |  |
Other assets |  | 57 | 62 |  |
Total assets |  | 11,557 | 12,357 |  |
Liabilities and stockholders' equity |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  | 897 | 966 |  |
Financial services [Member] | KB Home Corporate |  |  |  |  |
Assets |  |  |  |  |
Total assets |  | 0 | 0 |  |
Financial services [Member] | Guarantor Subsidiaries |  |  |  |  |
Assets |  |  |  |  |
Total assets |  | 0 | 0 |  |
Financial services [Member] | Non-Guarantor Subsidiaries |  |  |  |  |
Assets |  |  |  |  |
Total assets |  | 11,557 | 12,357 |  |
Consolidating Adjustments |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 0 | 0 | $ 0 | $ 0
Receivables |  | 0 | 0 |  |
Inventory, Operative Builders |  | 0 | 0 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 0 | 0 |  |
Deferred tax assets, net |  | 0 | 0 |  |
Other assets |  | 0 | 0 |  |
Investments in and Advances to Affiliates, Amount of Equity |  | (84,467) | (49,776) |  |
Total assets |  | (3,666,308) | (3,572,005) |  |
Due from Affiliates |  | (3,581,841) | (3,522,229) |  |
Liabilities and stockholders' equity |  |  |  |  |
Accounts payable, accrued expenses and other liabilities |  | 0 | 0 |  |
Mortgages and notes payable |  | 0 | 0 |  |
Financial services |  | 0 | 0 |  |
Due to Affiliate |  | (3,581,841) | (3,522,229) |  |
Stockholders' equity |  | (84,467) | (49,776) |  |
Total liabilities and stockholders’ equity |  | (3,666,308) | (3,572,005) |  |
Consolidating Adjustments | Homebuilding [Member] |  |  |  |  |
Assets |  |  |  |  |
Cash and Cash Equivalents, at Carrying Value |  | 0 | 0 |  |
Total assets |  | 0 | 0 |  |
Liabilities and stockholders' equity |  |  |  |  |
Total Liabilities Homebuilding |  | 0 | 0 |  |
Consolidating Adjustments | Financial services [Member] |  |  |  |  |
Assets |  |  |  |  |
Total assets |  | $ 0 | $ 0 |  |
[1] | February 28, 2018 November 30, 2017Assets Cash and cash equivalents$551 $231Receivables 1,489 1,724Investments in unconsolidated joint ventures 9,460 10,340Other assets57 62Total assets$11,557 $12,357Liabilities Accounts payable and accrued expenses$897 $966Total liabilities$897 $966

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