Investments in Unconsolidated Entities (Details Textual)	3 Months Ended					12 Months Ended			20 Months Ended
	Oct. 31, 2015 USD ($) a joint_ventures home_sites luxury_homes floors	Jan. 31, 2015 home_sites	Oct. 31, 2014 USD ($) home_sites	Jan. 31, 2014 USD ($)	Apr. 30, 2013 USD ($)	Oct. 31, 2015 USD ($) a joint_ventures home_sites luxury_homes floors	Oct. 31, 2014 USD ($)	Oct. 31, 2013 USD ($)	Apr. 17, 2015 USD ($)	Aug. 11, 2014 USD ($)	Jul. 31, 2014 home_sites
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Income (loss) from unconsolidated entities						$ 21,119,000	$ 41,141,000	$ 14,392,000
Investments in unconsolidated entities	$ 412,860,000		$ 447,078,000			412,860,000	447,078,000
Funding Commitments to Joint Ventures	195,593,000					195,593,000
Secured Debt	151,702,000		154,111,000			151,702,000	154,111,000
Line of Credit Facility, Maximum Borrowing Capacity	1,507,835,000					1,507,835,000
Amounts borrowed under commitments	$ 1,041,955,000					1,041,955,000
Land Sales						183,870,000	$ 242,931,000	$ 29,252,000
Retail Land Sales, Installment Method, Gross Profit, Deferred
Non cash transfer of investment in unconsolidated investments to inventory						$ 132,256,000	$ 2,704,000
Number of Joint Ventures | joint_ventures	21					21
Contribution of Property							4,152,000	$ 54,761,000
Proceeds from Equity Method Investment, Dividends or Distributions						$ 19,459,000	43,973,000	23,468,000
Management Fees Revenue						$ 11,299,000	7,306,000	2,890,000
Land Development Joint Venture, Irvine, California [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property | home_sites	840					840
Expected Percentage Of Homes To Be Sold To Each Joint Venture Partner						50.00%
Secured Debt	$ 320,000,000					$ 320,000,000
Land Development Joint Venture Texas Multi-Purpose [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property | home_sites	6,800					6,800
Line of Credit Facility, Maximum Borrowing Capacity	$ 40,000,000					$ 40,000,000
Amounts borrowed under commitments	$ 10,000,000					$ 10,000,000
Number Of Home Sites Owned By Joint Venture	6,300					6,300
Land Development Joint Venture Maryland [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property | home_sites	1,300					1,300
Expected Percentage Of Homes To Be Sold To Each Joint Venture Partner						50.00%
Number of acres owned by venture | a	945					945
Land Development Joint venture Texas 2900 Lots [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property | home_sites											2,900
Line of Credit Facility, Maximum Borrowing Capacity	$ 25,000,000					$ 25,000,000
Amounts borrowed under commitments	$ 26,100,000					$ 26,100,000
Number Of Home Sites Owned By Joint Venture	2,600					2,600
Maximum amount of line of credit commitment	$ 40,000,000					$ 40,000,000
Home Building Joint Venture Metro New York Three [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	124,000,000					124,000,000
Amounts borrowed under commitments	$ 70,100,000					$ 70,100,000
Home Building Joint Venture Metro New York [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number Of Floors To Be Acquired From Joint Venture | floors	18					18
Home Building Joint Venture Metro New York Two [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Amounts borrowed under commitments	$ 41,100,000					$ 41,100,000
Rental Property Joint Ventures Q Two Fiscal Fifteen [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	87,000,000					87,000,000
Amounts borrowed under commitments	0					0
Rental Property Joint Venture College Park, Maryland [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property										418
Line of Credit Facility, Maximum Borrowing Capacity	104,500,000					104,500,000
Amounts borrowed under commitments										$ 44,200,000
Limited Partners' Contributed Capital										35,700,000
Rental Property Joint Venture Northern New Jersey [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	70,000,000					70,000,000
Amounts borrowed under commitments	$ 31,600,000					$ 31,600,000
Rental Property Joint Ventures Capitol Riverfront [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property | luxury_homes	287					287
Line of Credit Facility, Maximum Borrowing Capacity	$ 54,000,000					$ 54,000,000
Amounts borrowed under commitments	46,300,000					46,300,000
Rental Property Joint Ventures Jersey City [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	120,000,000					120,000,000
Amounts borrowed under commitments	$ 96,100,000					$ 96,100,000
Number of floors in apartment building | floors	38					38
Rental Property Joint Venture Suburban Philadelphia [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property | luxury_homes	398					398
Line of Credit Facility, Maximum Borrowing Capacity	$ 56,000,000					$ 56,000,000
Amounts borrowed under commitments	50,000,000					50,000,000
Rental Property Joint Venture Metro New York [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	160,000,000					160,000,000
Amounts borrowed under commitments	$ 20,800,000					$ 20,800,000
Structured Asset Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	40.00%					40.00%
Toll Brothers Realty Trust [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Partners' Capital Account, Distributions			$ 36,000,000
Toll Brothers Realty Trust [Member] | Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	33.30%					33.30%
Toll Brothers Realty Trust [Member] | Management [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	33.30%					33.30%
Land Development Joint Venture, Irvine, California [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 76,813,000					$ 76,813,000
Funding Commitments to Joint Ventures	130,700,000					130,700,000
Land Development Joint Venture Five [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Funding Commitments to Joint Ventures	$ 17,000,000					$ 17,000,000
Number Of Lots Acquired From Joint Venture | home_sites		48	515
Land Development Joint Venture Texas Multi-Purpose [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 43,478,000					$ 43,478,000
Purchase Rights Land Contributed	$ 79,300,000					$ 79,300,000
Cost Reimbursement Percentage By Joint Venture Partner			50.00%
Land Development Joint Venture Maryland [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 12,167,000					$ 12,167,000
Land Development Joint venture Texas 2900 Lots [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 30,077,000					$ 30,077,000
Payments to Acquire Interest in Joint Venture					$ 15,500,000.00
Land Development Joint venture Texas 2900 Lots [Member] | Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Funding Commitments to Joint Ventures	$ 2,200,000					$ 2,200,000
Home Building Joint Venture Metro New York Three [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	25.00%					25.00%
Investments in unconsolidated entities	$ 16,900,000.00					$ 16,900,000.00
Payments to Acquire Interest in Joint Venture						15,900,000
Land Sales						78,500,000
Retail Land Sales, Installment Method, Gross Profit, Deferred						$ 9,260,000
Home Building Joint Venture Metro New York [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Non cash transfer of investment in unconsolidated investments to inventory						$ 132,256,000
Home Building Joint Venture Metro New York Two [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 35,700,000					$ 35,700,000
Home Building Joint Venture Metro New York Two [Member] | Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Funding Commitments to Joint Ventures	14,700,000					14,700,000
Rental Property Joint Ventures Q Two Fiscal Fifteen [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Investments in unconsolidated entities	$ 7,800,000					7,800,000
Land Sales						$ 14,500,000
Number of Joint Ventures | joint_ventures	2					2
Payments to Acquire and Develop Real Estate									$ 18,800,000
Rental Property Joint Ventures Q Two Fiscal Fifteen [Member] | Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	75.00%					75.00%
Rental Property Joint Ventures Q Two Fiscal Fifteen [Member] | Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Funding Commitments to Joint Ventures	$ 2,200,000					$ 2,200,000
Rental Property Joint Venture College Park, Maryland [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	25.00%					25.00%
Investments in unconsolidated entities	$ 12,700,000					$ 12,700,000				$ 11,900,000
Venture payment to align capital accounts	3,100,000
Contribution of Property	3,500,000
Rental Property Joint Venture Northern New Jersey [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Investments in unconsolidated entities	$ 6,700,000					$ 6,700,000
Rental Property Joint Ventures Capitol Riverfront [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 14,400,000					$ 14,400,000
Contribution of Property			$ 27,100,000
Proceeds from Equity Method Investment, Dividends or Distributions			12,500,000
Rental Property Joint Ventures Jersey City [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 31,700,000					$ 31,700,000
Venture payment to align capital accounts						1,200,000
Contribution of Property			28,800,000
Proceeds from Equity Method Investment, Dividends or Distributions						$ 10,200,000
Rental Property Joint Venture Suburban Philadelphia [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 13,100,000					$ 13,100,000
Rental Property Joint Venture Metro New York [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 23,100,000					$ 23,100,000
Rental Property Joint Venture Metro New York [Member] | Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Funding Commitments to Joint Ventures	$ 8,000,000					$ 8,000,000
Toll Brothers Realty Trust 2 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Income (loss) from unconsolidated entities			600,000	$ 23,500,000
Ownership Percentage	50.00%					50.00%
Investments in unconsolidated entities	$ 900,000					$ 900,000
Land Sales							2,900,000
Proceeds from Equity Method Investment, Dividends or Distributions							20,000,000
Toll Brothers Realty Trust 2 [Member] | Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Ownership Percentage	50.00%					50.00%
Toll Brothers Realty Trust [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Income (loss) from unconsolidated entities			12,000,000			$ 3,500,000
Ownership Percentage	33.30%					33.30%
Investments in unconsolidated entities	$ 0					$ 0
Management Fees Revenue						2,200,000	2,300,000	4,200,000
Partners' Capital Account, Distributions						6,100,000
Structured Asset Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Income (loss) from unconsolidated entities						$ 2,639,000	1,904,000	$ 5,668,000
Ownership Percentage	20.00%					20.00%
Investments in unconsolidated entities	$ 12,226,000		$ 19,995,000			$ 12,226,000	$ 19,995,000
Number of Joint Ventures | joint_ventures	1					1
Structured Asset Joint Venture [Member] | Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Funding Commitments to Joint Ventures	$ 0					$ 0