Represents the amount of difference between the fair value and carrying value.

No definition available.

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- Definition

Represents the weighted average remaining term of the mortgages based on which the market interest rate is assumed.

+ References

No definition available.

+ Details

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- Definition

This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

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- Definition

Amount of equity securities categorized neither as held-to-maturity nor as trading.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 3

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-Name Emerging Issues Task Force (EITF)

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- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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-Name Regulation S-X (SX)

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Subparagraph (a)

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- Definition

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References

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-Publisher FASB

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-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Fair Value Measurements (Details) (USD $)										3 Months Ended	12 Months Ended
Fair Value Measurements (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2013 Recurring Carrying and fair Value	Mar. 31, 2012 Recurring Carrying and fair Value	Mar. 31, 2013 Recurring Level 1	Mar. 31, 2012 Recurring Level 1	Mar. 31, 2013 Recurring Level 2	Mar. 31, 2012 Recurring Level 2	Mar. 31, 2013 BRT Realty Trust	Mar. 31, 2013 Other equity securities	Mar. 31, 2013 Mortgages payable	Dec. 31, 2012 Mortgages payable	Mar. 31, 2013 Line of credit
Fair Value of Financial Instruments
Estimated fair value of mortgages payable										$ 237,844,000	$ 233,170,000
Excess of fair value over carrying value										11,442,000	7,199,000
Blended or estimated market interest rate (as a percent)										4.25%	4.80%
Weighted average remaining term of the mortgages										8 years 10 months 24 days	9 years 2 months 12 days
Carrying amount of debt instrument												3,500,000
Available-for-sale securities:
Equity securities		281,000	278,000	281,000	278,000			260,000	21,000
Financial liabilities:
Derivative financial instruments		1,292,000	1,470,000			1,292,000	1,470,000
Available-for-sale securities
Aggregate cost of available-for-sale securities	138,000
Unrealized gain on available-for-sale securities	$ 143,000