MORTGAGE NOTES PAYABLE (Details) (USD $)		0 Months Ended		1 Months Ended	3 Months Ended	0 Months Ended						1 Months Ended
	Mar. 31, 2014	Jul. 15, 2013 Hamilton Green	Mar. 31, 2014 Courtyard at Westgate LLC	Feb. 28, 2014 Mortgages payable	Mar. 31, 2014 Mortgages payable	Dec. 20, 2013 Mortgages payable Hamilton Green	Mar. 13, 2014 Mortgages payable NERA Dean Street Associates, LLC	Oct. 02, 2013 Mortgages payable Westgate Apartments LLC	Feb. 25, 2013 Mortgages payable Hamilton Cypress LLC Commercial-1031Exchange Brookline, Massachusetts	Mar. 11, 2013 Mortgages payable Property located at School Street	Jul. 07, 2013 Mortgages payable Boylston Downtown L.P. Residential Apartments Boston, Massachusetts	Feb. 28, 2014 Mortgages payable Hamilton Linewt LLC Commercial-1031Exchange Newton, Massachusetts	Feb. 28, 2014 Mortgages payable Linhart L.P. Residential/Commercial Newton, Massachusetts	Mar. 31, 2014 Mortgages payable Minimum	Mar. 31, 2014 Mortgages payable Maximum
MORTGAGE NOTES PAYABLE
Interest rate (as a percent)						4.67%	4.22%	4.65%		3.70%	3.97%			3.76%	5.97%
Amount of monthly installments including principal					$ 819,000	$ 198,982
Weighted average interest rate (as a percent)					4.85%
Effective interest rate (as a percent)	5.46%				4.96%
Annual maturities of mortgage debt
2015-current maturities	7,224,000
2016	285,000
2017	1,439,000
2018	1,801,000
2019	7,880,000
Thereafter	176,444,000
Total	195,073,000
Additional disclosures related to mortgages
Amount of mortgage paid off						40,000,000			3,967,000			1,465,813	1,926,272
Mortgage prepayment penalties				0					0
Amount of new loan							5,500,000	15,700,000		15,000,000	40,000,000
Period of interest only payments on loans						2 years	10 years	10 years		3 years
Term of debt						15 years					15 years
Period for which the entity is required to make interest only payments						2 years					3 years
Amortization period of debt						30 years				30 years	30 years
Amount of loan proceeds utilized for pay off the existing mortgage						1,846,000	5,100,000	7,616,000		15,284,000	19,500,000
Deferred financing cost associated with mortgage										159,000
Net proceed from the loan - cash back											20,000,000
Refinancing cost											279,000
Closing costs associated with financing		38,000				346,000	100,000	190,000
Amount of new loan						38,500,000
Deposits for refinancing included in other assets			$ 77,500