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SIGNIFICANT ACCOUNTING POLICIES (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 property item	Dec. 31, 2011	Dec. 31, 2010
Concentration of Credit Risk
Number of states in which properties are located	29
Number of real estate investments	100
Rental revenues	$ 44,750	$ 41,805	$ 37,630
Rental revenue | Geographic concentration | New York
Concentration of Credit Risk
Concentration risk percentage	13.90%	15.30%	16.50%
Rental revenue | Geographic concentration | Pennsylvania
Concentration of Credit Risk
Concentration risk percentage	11.00%	12.00%	11.00%
Rental revenue | Customer concentration | Haverty Furniture Companies, Inc.
Concentration of Credit Risk
Number of states in which properties are located	6
Concentration risk percentage	10.80%	11.60%	12.90%
Number of real estate investments	11
Real estate investments (as a percent)	11.70%
Rental revenues	$ 4,844	$ 4,844	$ 4,844

X

- Definition

Represents the real estate investments, expressed as a percentage of depreciated book value of real estate investments held as of the balance sheet date.

+ References

No definition available.

+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611

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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

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X

- Definition

The aggregate revenue from real estate operations during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(e))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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