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Investments in Unconsolidated Entities (Details Textual) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2017 USD ($) | Jan. 31, 2018 USD ($) joint_ventures Homes_sold rental_units home_sites | Jan. 31, 2017 USD ($) Homes_sold home_sites | Oct. 31, 2017 USD ($) | Nov. 01, 2017 USD ($)
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Land Sales |  | $ 6,968,000 | $ 144,714,000 |  |
Equity Method Investment, Summarized Financial Information, Revenue |  | 193,620,000 | 295,702,000 |  |
Proceeds from Equity Method Investment, Distribution |  | 38,892,000 | 48,581,000 |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 449,748,000 |  | $ 481,758,000 |
Line of Credit Facility, Maximum Borrowing Capacity |  | 1,531,354,000 |  |  |
Long-term Line of Credit |  | 1,115,356,000 |  |  |
Management Fees Revenue |  | $ 3,071,000 | $ 4,289,000 |  |
Land Development Joint Ventures [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Home sites sold | home_sites |  | 249 | 303 |  |
Land Sales |  | $ 40,200,000 | $ 56,300,000 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 200,988,000 |  |  |
Long-term Line of Credit |  | $ 184,944,000 |  |  |
Home Building Joint Ventures, Total [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Home sites sold | Homes_sold |  | 28 | 87 |  |
Equity Method Investment, Summarized Financial Information, Revenue |  | $ 32,600,000 | $ 217,400,000 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 382,031,000 |  |  |
Long-term Line of Credit |  | $ 196,536,000 |  |  |
Rental Joint Ventures, including the Trust [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Real Estate Properties | joint_ventures |  | 12 |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 948,335,000 |  |  |
Long-term Line of Credit |  | 733,876,000 |  |  |
Rental Property Joint Ventures College Park, Maryland [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Land Sales |  | $ 219,000,000 |  |  |
Rental Property Joint Venture Belmont MA [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Units in Real Estate Property |  | 112 |  |  |
Future financing to be obtained by JV |  | $ 42,400,000 |  |  |
Rental Property Joint Venture Suburban Philadelphia [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Debt Instrument, Term | 10 years |  |  |  |
Long-term Debt |  | $ 56,000,000 |  |  |
Toll Brothers Realty Trust [Member] | Co-venturer [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 33.30% |  |  |
Toll Brothers Realty Trust [Member] | Management [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 33.30% |  |  |
Land Development Joint Ventures [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | $ 225,283,000 |  |  |
Land Development Joint Ventures [Member] | Equity Method Investee [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Home sites sold | home_sites |  | 30 | 102 |  |
Equity Method Investment, Summarized Financial Information, Revenue |  | $ 3,200,000 | $ 25,000,000 |  |
Equity Method Investment, Deferred Gain on Sale |  | 500,000 | 3,700,000 |  |
Rental Property Joint Ventures College Park, Maryland [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Proceeds from Sale of Equity Method Investments |  | 39,300,000 |  |  |
Equity Method Investment, Realized Gain (Loss) on Disposal |  | 30,800,000 |  |  |
Rental Property Joint Venture Belmont MA [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Payments to Acquire and Develop Real Estate |  |  |  | $ 22,100,000 |
Proceeds from Equity Method Investment, Distribution |  | 10,800,000 |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | 11,300,000 |  |  |
Rental Property Joint Venture Belmont MA [Member] | Co-venturer [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Land Sales |  | $ 11,000,000 |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |  |
Rental Property Joint Venture Suburban Philadelphia [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 25.00% |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | $ 2,800,000 |  |  |
Toll Brothers Realty Trust [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 33.30% |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | $ 0 |  |  |
Management Fees Revenue |  | $ 600,000 | 400,000 |  |
Gibraltar Joint Ventures [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 25.00% |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  | $ 14,598,000 |  |  |
Occupied or Ready for Occupancy [Member] | Rental Joint Ventures, including the Trust [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Units in Real Estate Property | rental_units |  | 2,800 |  |  |
Lease up Stage [Member] | Rental Joint Ventures, including the Trust [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Units in Real Estate Property | rental_units |  | 750 |  |  |
Asset under Construction [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Units in Real Estate Property | rental_units |  | 1,050 |  |  |
Asset under Construction [Member] | Rental Joint Ventures, including the Trust [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Units in Real Estate Property | rental_units |  | 1,250 |  |  |
In Planning Phase [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Number of Units in Real Estate Property | rental_units |  | 9,350 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Rental Property Joint Venture Suburban Philadelphia [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Proceeds from Sale of Equity Method Investments |  |  | 12,000,000 |  |
Equity Method Investment, Realized Gain (Loss) on Disposal |  |  | 6,200,000 |  |
Line of Credit [Member] | Rental Property Joint Ventures College Park, Maryland [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 110,000,000
Line of Credit [Member] | Rental Property Joint Venture Suburban Philadelphia [Member] |  |  |  |  |
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract] |  |  |  |  |
Long-term Line of Credit | $ 54,100,000 |  | $ 54,100,000 |  |

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