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Supplemental Guarantor Information (Level 4 IS) (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
Supplemental Condensed Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 2,027,907 | $ 1,502,909 | $ 1,363,512 | $ 920,730 | $ 1,855,451 | $ 1,269,934 | $ 1,115,557 | $ 928,566 | $ 5,815,058 | $ 5,169,508 | $ 4,171,248
Cost of revenues |  |  |  |  |  |  |  |  | 4,562,303 | 4,144,065 | 3,269,270
Selling, general and administrative |  |  |  |  |  |  |  |  | 607,819 | 535,382 | 455,108
Total |  |  |  |  |  |  |  |  | 5,170,122 | 4,679,447 | 3,724,378
Income (loss) from operations |  |  |  |  |  |  |  |  | 644,936 | 490,061 | 446,870
Other [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from unconsolidated entities |  |  |  |  |  |  |  |  | 116,066 | 40,748 | 21,119
Other income - net |  |  |  |  |  |  |  |  | 53,309 | 58,218 | 67,573
Intercompany interest income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest Expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Loss from subsidiaries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Income (loss) before income tax benefit | 301,747 | 203,574 | 199,209 | 109,781 | 168,160 | 163,653 | 140,397 | 116,817 | 814,311 | 589,027 | 535,562
Income tax provision |  |  |  |  |  |  |  |  | 278,816 | 206,932 | 172,395
Net income | $ 191,878 | $ 148,563 | $ 124,638 | $ 70,416 | $ 114,378 | $ 105,483 | $ 89,054 | $ 73,180 | 535,495 | 382,095 | 363,167
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  | 1,426 | (827) | 329
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | 536,921 | 381,268 | 363,496
Toll Brothers Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Supplemental Condensed Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Cost of revenues |  |  |  |  |  |  |  |  |  |  |
Selling, general and administrative |  |  |  |  |  |  |  |  | 58 | 75 | 113
Total |  |  |  |  |  |  |  |  | 58 | 75 | 113
Income (loss) from operations |  |  |  |  |  |  |  |  | (58) | (75) | (113)
Other [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from unconsolidated entities |  |  |  |  |  |  |  |  |  |  |
Other income - net |  |  |  |  |  |  |  |  | 10,574 | 9,501 | 9,429
Intercompany interest income |  |  |  |  |  |  |  |  |  |  |
Interest Expense |  |  |  |  |  |  |  |  |  |  |
Loss from subsidiaries |  |  |  |  |  |  |  |  | 803,795 | 579,601 | 526,246
Income (loss) before income tax benefit |  |  |  |  |  |  |  |  | 814,311 | 589,027 | 535,562
Income tax provision |  |  |  |  |  |  |  |  | 278,816 | 206,932 | 172,395
Net income |  |  |  |  |  |  |  |  | 535,495 | 382,095 | 363,167
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  | 1,426 | (858) | 311
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | 536,921 | 381,237 | 363,478
Subsidiary Issuer [Member] |  |  |  |  |  |  |  |  |  |  |
Supplemental Condensed Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |
Cost of revenues |  |  |  |  |  |  |  |  |  |  |
Selling, general and administrative |  |  |  |  |  |  |  |  | 4,033 | 3,809 | 3,560
Total |  |  |  |  |  |  |  |  | 4,033 | 3,809 | 3,560
Income (loss) from operations |  |  |  |  |  |  |  |  | (4,033) | (3,809) | (3,560)
Other [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from unconsolidated entities |  |  |  |  |  |  |  |  |  |  |
Other income - net |  |  |  |  |  |  |  |  |  |  |
Intercompany interest income |  |  |  |  |  |  |  |  | 156,366 | 145,828 | 137,362
Interest Expense |  |  |  |  |  |  |  |  | (162,882) | (151,410) | (143,193)
Loss from subsidiaries |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income tax benefit |  |  |  |  |  |  |  |  | (10,549) | (9,391) | (9,391)
Income tax provision |  |  |  |  |  |  |  |  | (3,612) | (3,299) | (3,628)
Net income |  |  |  |  |  |  |  |  | (6,937) | (6,092) | (5,763)
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | (6,937) | (6,092) | (5,763)
Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Supplemental Condensed Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 5,668,610 | 4,984,356 | 4,213,776
Cost of revenues |  |  |  |  |  |  |  |  | 4,414,461 | 3,919,729 | 3,276,078
Selling, general and administrative |  |  |  |  |  |  |  |  | 635,247 | 558,822 | 481,943
Total |  |  |  |  |  |  |  |  | 5,049,708 | 4,478,551 | 3,758,021
Income (loss) from operations |  |  |  |  |  |  |  |  | 618,902 | 505,805 | 455,755
Other [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from unconsolidated entities |  |  |  |  |  |  |  |  | 12,271 | 16,913 | 14,034
Other income - net |  |  |  |  |  |  |  |  | 28,900 | 27,873 | 34,098
Intercompany interest income |  |  |  |  |  |  |  |  | 48 |  |
Interest Expense |  |  |  |  |  |  |  |  | (4,365) |  |
Loss from subsidiaries |  |  |  |  |  |  |  |  | 142,779 | 29,010 | 22,359
Income (loss) before income tax benefit |  |  |  |  |  |  |  |  | 798,535 | 579,601 | 526,246
Income tax provision |  |  |  |  |  |  |  |  | 273,418 | 203,614 | 203,296
Net income |  |  |  |  |  |  |  |  | 525,117 | 375,987 | 322,950
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  |  | 31 | 18
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | 525,117 | 376,018 | 322,968
Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Supplemental Condensed Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 336,671 | 361,685 | 77,226
Cost of revenues |  |  |  |  |  |  |  |  | 223,243 | 288,044 | 12,909
Selling, general and administrative |  |  |  |  |  |  |  |  | 77,115 | 74,328 | 60,377
Total |  |  |  |  |  |  |  |  | 300,358 | 362,372 | 73,286
Income (loss) from operations |  |  |  |  |  |  |  |  | 36,313 | (687) | 3,940
Other [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from unconsolidated entities |  |  |  |  |  |  |  |  | 103,795 | 23,835 | 7,085
Other income - net |  |  |  |  |  |  |  |  | 10,674 | 17,456 | 21,724
Intercompany interest income |  |  |  |  |  |  |  |  | 4,365 |  |
Interest Expense |  |  |  |  |  |  |  |  | (1,819) | (2,203) | (999)
Loss from subsidiaries |  |  |  |  |  |  |  |  |  |  |
Income (loss) before income tax benefit |  |  |  |  |  |  |  |  | 153,328 | 38,401 | 31,750
Income tax provision |  |  |  |  |  |  |  |  | 52,500 | 13,490 | 12,265
Net income |  |  |  |  |  |  |  |  | 100,828 | 24,911 | 19,485
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | 100,828 | 24,911 | 19,485
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Supplemental Condensed Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | (190,223) | (176,533) | (119,754)
Cost of revenues |  |  |  |  |  |  |  |  | (75,401) | (63,708) | (19,717)
Selling, general and administrative |  |  |  |  |  |  |  |  | (108,634) | (101,652) | (90,885)
Total |  |  |  |  |  |  |  |  | (184,035) | (165,360) | (110,602)
Income (loss) from operations |  |  |  |  |  |  |  |  | (6,188) | (11,173) | (9,152)
Other [Abstract] |  |  |  |  |  |  |  |  |  |  |
Income (loss) from unconsolidated entities |  |  |  |  |  |  |  |  |  |  |
Other income - net |  |  |  |  |  |  |  |  | 3,161 | 3,388 | 2,322
Intercompany interest income |  |  |  |  |  |  |  |  | (160,779) | (145,828) | (137,362)
Interest Expense |  |  |  |  |  |  |  |  | 169,066 | 153,613 | 144,192
Loss from subsidiaries |  |  |  |  |  |  |  |  | (946,574) | (608,611) | (548,605)
Income (loss) before income tax benefit |  |  |  |  |  |  |  |  | (941,314) | (608,611) | (548,605)
Income tax provision |  |  |  |  |  |  |  |  | (322,306) | (213,805) | (211,933)
Net income |  |  |  |  |  |  |  |  | (619,008) | (394,806) | (336,672)
Other Comprehensive Income (Loss), Net of Tax |  |  |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | $ (619,008) | $ (394,806) | $ (336,672)

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