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Investments in Unconsolidated Entities (Details Textual) $ in Thousands	3 Months Ended			6 Months Ended
	Apr. 30, 2020 USD ($) rental_units home_sites joint_ventures Homes_sold	Jan. 31, 2020 USD ($)	Apr. 30, 2019 USD ($) home_sites Homes_sold	Apr. 30, 2020 USD ($) joint_ventures rental_units home_sites Homes_sold	Apr. 30, 2019 USD ($) home_sites Homes_sold	Oct. 31, 2019 USD ($)
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Summarized Financial Information, Revenue	$ 79,112		$ 178,388	$ 212,282	$ 331,617
Revenues	1,549,072		1,716,094	2,880,503	3,079,275
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	364,041			364,041		$ 366,252
Line of Credit Facility, Maximum Borrowing Capacity	1,689,850			1,689,850
Long-term Line of Credit	1,240,626			1,240,626
Other Commitment	$ 45,276			$ 45,276
Number of Joint Ventures \| joint_ventures	41			41
Equity Method Investment, Other than Temporary Impairment	$ 3,000		$ 0	$ 3,000	$ 0
Rental Property Joint Ventures Northern New Jersey [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity						76,000
Rental Property Joint Ventures new fiscal 2020 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	121,500			121,500
Long-term Line of Credit	11,400			11,400
Rental Property Joint Ventures new fiscal 2019 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	134,400			134,400
Long-term Line of Credit	$ 62,600			$ 62,600
Land Development Joint Ventures [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Home sites sold \| home_sites	169		297	333	498
Equity Method Investment, Summarized Financial Information, Revenue	$ 19,300		$ 49,000	$ 43,900	$ 138,800
Line of Credit Facility, Maximum Borrowing Capacity	110,842			110,842
Long-term Line of Credit	$ 95,900			$ 95,900
Home Building Joint Ventures, Total [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Home sites sold \| Homes_sold	9		55	32	72
Equity Method Investment, Summarized Financial Information, Revenue	$ 24,300		$ 94,600	$ 91,400	$ 121,800
Line of Credit Facility, Maximum Borrowing Capacity	62,384			62,384
Long-term Line of Credit	62,384			62,384
Home Building Joint Venture Metro New York Five [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	76,600			76,600		236,500
Long-term Line of Credit	$ 62,400			$ 62,400
Rental Joint Ventures, including the Trust [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Real Estate Properties \| joint_ventures	25			25
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,516,624			$ 1,516,624
Long-term Line of Credit	$ 1,082,342			$ 1,082,342
Toll Brothers Realty Trust [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	33.30%			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%			33.30%
Rental Property Joint Ventures new fiscal 2020 Woburn MA [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 75,400			$ 75,400
Long-term Line of Credit	$ 0			0
Rental Property Joint Ventures Northern New Jersey [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Proceeds from Sale of Equity Method Investments				16,800
Equity Method Investment, Realized Gain (Loss) on Disposal				$ 10,700
Rental Property Joint Ventures new fiscal 2020 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Real Estate Properties \| joint_ventures	2			2
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 24,900			$ 24,900
Rental Property Joint Ventures new fiscal 2019 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Real Estate Properties \| joint_ventures	2			2
Land sales earnings, net					$ 8,400
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 15,700			$ 15,700
Rental Property Joint Ventures new fiscal 2019 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	75.00%			75.00%
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	$ 103,301			$ 103,301
Number of Joint Ventures \| joint_ventures	8			8
Land Development Joint Ventures [Member] \| Equity Method Investee [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Home sites sold \| home_sites	44		88	86	195
Equity Method Investment, Summarized Financial Information, Revenue	$ 4,300		$ 25,300	$ 7,800	$ 96,500
Toll Brothers Realty Trust [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	33.30%			33.30%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 0			$ 0
Property Management Fee Revenue				$ 500
Gibraltar Land Banking & Development Joint Ventures [Member] [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	25.00%			25.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 20,400			$ 20,400
Number of Joint Ventures \| joint_ventures	6			6
Single Family Build to Rent JV [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 2,400			$ 2,400
Rental Property Joint Ventures new fiscal 2020 Woburn MA [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Land sales earnings, net	900
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 7,000			$ 7,000
Rental Property Joint Ventures new fiscal 2020 Woburn MA [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	75.00%			75.00%
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	2,000			2,000
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	1,850			1,850
Asset under Construction [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property \| rental_units	200			200
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	4,200			4,200
In Planning Phase [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Units in Real Estate Property \| rental_units	13,050			13,050
Rental Property Joint Ventures new fiscal 2019 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Payments to Acquire and Develop Real Estate					41,900
Rental Property Joint Ventures new fiscal 2020 [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Payments to Acquire and Develop Real Estate				$ 51,000
Rental Joint Ventures, including the Trust [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Real Estate Properties \| joint_ventures	5			5
Real Estate Investment Property, at Cost						95,500
Variable Interest Entity, Primary Beneficiary [Member] \| Rental Joint Ventures, including the Trust [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Number of Real Estate Properties \| joint_ventures	5			5
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 142,600			$ 142,600		145,800
Noncontrolling Interest in Variable Interest Entity	42,300			42,300		$ 41,000
Land [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Revenues	32,838		$ 4,037	66,932	47,910
Land [Member] \| Rental Property Joint Ventures new fiscal 2020 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Revenues		$ 26,200
Land [Member] \| Rental Property Joint Ventures new fiscal 2019 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Revenues					$ 39,800
Land [Member] \| Rental Property Joint Ventures new fiscal 2020 Woburn MA [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Revenues	19,100
Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member] \| Land Development Joint Ventures [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Other Commitment	27,530			27,530
Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member] \| Gibraltar Land Banking & Development Joint Ventures [Member] [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Other Commitment	100,000			100,000
Commitment To Advance Or Invest In Affiliates Subsidiaries And Joint Venture [Member] \| Single Family Build to Rent JV [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Other Commitment	$ 60,000			$ 60,000
Minimum [Member] \| Rental Property Joint Ventures new fiscal 2020 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	50.00%			50.00%
Minimum [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Rental Property Joint Ventures new fiscal 2019 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	50.00%			50.00%
Maximum [Member] \| Rental Property Joint Ventures new fiscal 2020 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	70.00%			70.00%
Maximum [Member] \| Variable Interest Entity, Primary Beneficiary [Member] \| Rental Property Joint Ventures new fiscal 2019 [Member] \| Co-venturer [Member]
Investments in and Advances to Unconsolidated Entities (Textual) [Abstract]
Equity Method Investment, Ownership Percentage	98.00%			98.00%