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Amount for accounts payable to related parties.

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Management agreement, fees and transactions with related party (Details) (USD $)	12 Months Ended			0 Months Ended	6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2006	May 07, 2008
Related Party Transaction [Line Items]
Asset management fees	$ 1,968,000us-gaap_OwnedPropertyManagementCosts	$ 1,849,000us-gaap_OwnedPropertyManagementCosts	$ 1,863,000us-gaap_OwnedPropertyManagementCosts
Total construction financing, including other members	14,460,000
Secured loans receivable to noncontrolling interest	(2,128,000)
Amount of the capital call	8,700,000frevsob_CapitalCall
Payment of capital call	8,700,000
S and A Commercial Associates Limited Partnership ("S and A") [Member]
Related Party Transaction [Line Items]
Ownership by parent (percentage)	65.00%
Damascus Centre, LLC [Member]
Related Party Transaction [Line Items]
Ownership by parent (percentage)	70.00%
Ownership by noncontrolling owners (percentage)	30.00%
Sale of interest				3,224,000
Sale of interest, amount financed				1,451,000
Grande Rotunda, LLC [Member]
Related Party Transaction [Line Items]
Aggregate outstanding principal balance	5,451,000	3,323,000
Accrued but unpaid interest	595,000	486,000
Ownership by parent (percentage)	60.00%
Ownership by noncontrolling owners (percentage)	40.00%
Managing Agent Hekemian & Co [Member]
Related Party Transaction [Line Items]
Asset management fees	1,866,000	1,747,000	1,792,000
Leasing commissions and reimbursement of operating expenses	673,000	339,000	402,000
Leasing commissions	396,000
Insurance commissions	133,000	121,000	122,000
Sales commissions	880,000	185,000	317,000
Other fees - refinancing		239,000
Maximum advances to employees	4,000,000				2,000,000
Accounts Payable	171,000	152,000
Robert S. Hekemian [Member]
Related Party Transaction [Line Items]
Trustee fee expense	642,000	586,000	546,000
Robert S. Hekemian, Jr. [Member]
Related Party Transaction [Line Items]
Trustee fee expense	46,000	40,000	43,000
Rotunda 100 [Member]
Related Party Transaction [Line Items]
Secured loans receivable to noncontrolling interest	(2,100,000)
Basis points, interest rate	2.25%
Amount of the capital call	5,800,000
Payment of capital call	5,800,000
Advance to affiliate	3,700,000
Fee amount	1,400,000
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Development fee (as percentage)	6.375%
Development costs, maximum amount	84,600,000
Development fees paid		3,000,000
Fee, monthly amount during design phase	500,000
Fee, to be paid on issuance of certificate of occupancy	900,000
Affiliated Entity 1 [Member]
Related Party Transaction [Line Items]
Development fees paid	1,000,000
Redevelopment fee (as percentage)	7.00%
Redevelopment costs, maximum amount	17,300,000
Redevelopment fees	1,998,000	1,823,000	317,000
Construction and development costs		1,400,000
Development fees included in accounts payable	$ 900,000	$ 900,000