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SUBSEQUENT EVENTS (Details) (USD $)	12 Months Ended		76 Months Ended	12 Months Ended		76 Months Ended	0 Months Ended	12 Months Ended		76 Months Ended	0 Months Ended	12 Months Ended		76 Months Ended	3 Months Ended	1 Months Ended			3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013 Class A units	Dec. 31, 2012 Class A units	Dec. 31, 2013 Class A units	Sep. 17, 2008 Class B Units	Dec. 31, 2013 Class B Units	Dec. 31, 2012 Class B Units	Dec. 31, 2013 Class B Units	Sep. 17, 2008 General Partnership units	Dec. 31, 2013 General Partnership units	Dec. 31, 2012 General Partnership units	Dec. 31, 2013 General Partnership units	Mar. 18, 2014 Subsequent events	Feb. 28, 2014 Subsequent events Mortgage	Feb. 28, 2014 Subsequent events Mortgage Hamilton Linewt LLC Commercial-1031Exchange Newton, Massachusetts	Feb. 28, 2014 Subsequent events Mortgage Linhart L.P. Residential/Commercial Newton, Massachusetts	Mar. 18, 2014 Subsequent events Class B Units	Mar. 18, 2014 Subsequent events General Partnership units
Subsequent events
Repurchase of depository receipts	22,964	24,967	1,242,891							2,103					6,235
Repurchase price of depository receipts	$ 37.80		$ 24.86												$ 45.56
Repurchase price of units	$ 1,134					$ 745.80				$ 658.89				$ 658.89	$ 1,366.87
Repurchase of units	957	1,040					6,309	182	198		333	10	10	111					49.36	2.60
Total cost of repurchase	$ 1,094,609	$ 906,214	$ 32,481,000	$ 877,623	$ 726,058			$ 206,137	$ 171,148			$ 10,849	$ 9,008						$ 67,470	$ 3,551
Repurchase of depository receipts	877,623	726,058													292,169
Amount of mortgage paid off																	1,465,813	1,926,272
Mortgage prepayment penalties																$ 0

X

- Definition

Represents the number of depository receipts repurchased under the equity repurchase program.

+ References

No definition available.

+ Details

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- Definition

Represents the average price at which depository receipts are repurchased under the equity repurchase program.

+ References

No definition available.

+ Details

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- Definition

Represents the amount of depository receipts repurchased under the equity repurchase program.

+ References

No definition available.

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- Definition

Represents the average price at which units are repurchased under the equity repurchase program.

+ References

No definition available.

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- Definition

Value of units that were previously issued and have been repurchased during the year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054

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- Definition

Units that were previously issued and have been repurchased during the year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

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- Definition

The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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