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Supplemental Guarantor Information (Condensed Consolidating Statements of Operations) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2017 | Aug. 31, 2017 | May 31, 2017 | Feb. 28, 2017 | Nov. 30, 2016 | Aug. 31, 2016 | May 31, 2016 | Feb. 29, 2016 | Nov. 30, 2017 | Nov. 30, 2016 | Nov. 30, 2015
Condensed Consolidated Statements of Operations |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 1,403,138 | $ 1,144,001 | $ 1,002,794 | $ 818,596 | $ 1,191,942 | $ 913,283 | $ 811,050 | $ 678,371 | $ 4,368,529 | $ 3,594,646 | $ 3,032,030
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 4,356,265 | 3,582,943 | 3,020,987
Construction and land costs |  |  |  |  |  |  |  |  |  | (3,646,468) | (3,041,101) | (2,539,368)
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | (426,394) | (389,441) | (342,998)
Operating income |  |  |  |  |  |  |  |  |  | 283,403 | 152,401 | 138,621
Interest income |  |  |  |  |  |  |  |  |  | 1,240 | 529 | 458
Interest Expense | [1] |  |  |  |  |  |  |  |  | (6,307) | (5,900) | (21,856)
Intercompany Interest Income (Expense) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | 2,825 | (5,601) | 2,488
Pretax income (loss) |  | 137,346 | 79,208 | 51,982 | 21,459 | 55,028 | 53,463 | 24,797 | 16,027 | 289,995 | 149,315 | 127,043
Income tax expense |  |  |  |  |  |  |  |  |  | (109,400) | (43,700) | (42,400)
Income (Loss) from Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income |  | $ 84,346 | $ 50,208 | $ 31,782 | $ 14,259 | $ 37,528 | $ 39,363 | $ 15,597 | $ 13,127 | 180,595 | 105,615 | 84,643
KB Home Corporate |  |  |  |  |  |  |  |  |  |  |  |
Condensed Consolidated Statements of Operations |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Construction and land costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | (91,120) | (91,859) | (86,053)
Operating income |  |  |  |  |  |  |  |  |  | (91,120) | (91,859) | (86,053)
Interest income |  |  |  |  |  |  |  |  |  | 1,232 | 470 | 451
Interest Expense |  |  |  |  |  |  |  |  |  | (172,102) | (177,329) | (180,701)
Intercompany Interest Income (Expense) |  |  |  |  |  |  |  |  |  | 266,784 | 301,432 | 289,727
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 4,794 | 32,714 | 23,424
Income tax expense |  |  |  |  |  |  |  |  |  | (8,800) | 17,200 | 2,000
Income (Loss) from Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 184,601 | 55,701 | 59,219
Net income |  |  |  |  |  |  |  |  |  | 180,595 | 105,615 | 84,643
Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Condensed Consolidated Statements of Operations |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 3,957,267 | 3,169,545 | 2,640,678
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 3,957,267 | 3,169,545 | 2,640,678
Construction and land costs |  |  |  |  |  |  |  |  |  | (3,286,891) | (2,661,888) | (2,196,228)
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | (293,233) | (251,384) | (213,292)
Operating income |  |  |  |  |  |  |  |  |  | 377,143 | 256,273 | 231,158
Interest income |  |  |  |  |  |  |  |  |  | 8 | 55 | 6
Interest Expense |  |  |  |  |  |  |  |  |  | (1,635) | (3,958) | (6,184)
Intercompany Interest Income (Expense) |  |  |  |  |  |  |  |  |  | (117,926) | (107,388) | (101,540)
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 256,183 | 142,803 | 121,637
Income tax expense |  |  |  |  |  |  |  |  |  | (100,000) | (52,700) | (46,700)
Income (Loss) from Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income |  |  |  |  |  |  |  |  |  | 156,183 | 90,103 | 74,937
Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Condensed Consolidated Statements of Operations |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 411,262 | 425,101 | 391,352
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 398,998 | 413,398 | 380,309
Construction and land costs |  |  |  |  |  |  |  |  |  | (359,577) | (379,213) | (343,140)
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | (42,041) | (46,198) | (43,653)
Operating income |  |  |  |  |  |  |  |  |  | (2,620) | (12,013) | (6,484)
Interest income |  |  |  |  |  |  |  |  |  | 0 | 4 | 1
Interest Expense |  |  |  |  |  |  |  |  |  | 3,434 | 3,946 | 0
Intercompany Interest Income (Expense) |  |  |  |  |  |  |  |  |  | 22,006 | (14,711) | (23,158)
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 29,018 | (26,202) | (18,018)
Income tax expense |  |  |  |  |  |  |  |  |  | (600) | (8,200) | 2,300
Income (Loss) from Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Net income |  |  |  |  |  |  |  |  |  | 28,418 | (34,402) | (15,718)
Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | (1,409) | (2,181) | (1,804)
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 276,927 | 144,849 | 115,419
Homebuilding [Member] | KB Home Corporate |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 4,794 | 32,714 | 23,424
Homebuilding [Member] | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | (1,407) | (2,179) | (1,803)
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 256,183 | 142,803 | 121,637
Homebuilding [Member] | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | (2) | (2) | (1)
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 15,950 | (30,668) | (29,642)
Financial services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  | 8,834 | 7,886 | 7,332
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | 4,234 | (3,420) | 4,292
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 13,068 | 4,466 | 11,624
Financial services [Member] | KB Home Corporate |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Financial services [Member] | Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Financial services [Member] | Non-Guarantor Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 13,068 | 4,466 | 11,624
Consolidating Adjustments |  |  |  |  |  |  |  |  |  |  |  |
Condensed Consolidated Statements of Operations |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Construction and land costs |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Selling, general and administrative expenses |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Operating income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest income |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest Expense |  |  |  |  |  |  |  |  |  | 170,864 | 179,333 | 165,029
Intercompany Interest Income (Expense) |  |  |  |  |  |  |  |  |  | (170,864) | (179,333) | (165,029)
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income tax expense |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (Loss) from Subsidiaries, Net of Tax |  |  |  |  |  |  |  |  |  | (184,601) | (55,701) | (59,219)
Net income |  |  |  |  |  |  |  |  |  | (184,601) | (55,701) | (59,219)
Consolidating Adjustments | Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Equity in income (loss) of unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Pretax income (loss) |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Consolidating Adjustments | Financial services [Member] |  |  |  |  |  |  |  |  |  |  |  |
Homebuilding: |  |  |  |  |  |  |  |  |  |  |  |
Pretax income (loss) |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0
[1] | Interest incurred and interest expensed for the year ended November 30, 2017 included a charge of $5.7 million for the early extinguishment of debt.

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