Document and Entity Information (USD $)	12 Months Ended
	Oct. 31, 2011	Jan. 13, 2012	Apr. 30, 2011
Document And Entity Information
Entity Registrant Name	FIRST REAL ESTATE INVESTMENT TRUST OF NEW JERSEY
Entity Central Index Key	0000036840
Document Type	10-K
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Document Period End Date	Oct. 31, 2011
Amendment Flag	false
Current Fiscal Year End Date	--10-31
Is Entity a Well-known Seasoned Issuer?	No
Is Entity a Voluntary Filer?	No
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 88,000,000
Entity Common Stock, Shares Outstanding		6,942,143