Represents the amount of principal to be repaid upon notice as per the request of the lender.

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Represents the period of notice to be served in order to demand earlier payment of debt in whole or in part.

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Represents the term of mortgage loan.

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Represents the number of limited partnerships and limited liability companies in which the entity has made investments.

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This element represents the amount of management fee incurred for payment to a management company during the reporting period.

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Represents the number of employees other than the President having an ownership interest.

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Represents the charge against earnings towards management fees associate with the services provided by related party.

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Represents the management fee, expressed as a percentage of gross rental revenues from properties owned.

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Represents the management fees expressed as a percentage of Linewt.

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Represents the number of employees who perform accounting and bookkeeping functions.

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Represents the amount reimbursed to related party for transfer of employee payroll.

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Represents the rental commissions received.

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The aggregate costs related to asset management during the reporting period.

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The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

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Decrease for amounts repaid on the debt instrument for the period.

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Increase of additional borrowings on existing and new debt instruments.

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Interest rate stated in the contractual debt agreement.

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Amount of the required periodic payments applied to principal.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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The amount of cash paid for interest during the period.

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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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Amount of transactions with related party during the financial reporting period.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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RELATED PARTY TRANSACTIONS (Details) (USD $)	3 Months Ended		9 Months Ended								9 Months Ended			9 Months Ended								1 Months Ended							3 Months Ended	9 Months Ended
RELATED PARTY TRANSACTIONS (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 item	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Limited Partnerships Minimum	Sep. 30, 2012 Limited Partnerships Maximum	Sep. 30, 2012 Partially Owned Properties [Member]	Sep. 30, 2012 Wholly Owned Properties [Member]	Dec. 31, 2011 Wholly Owned Properties [Member]	Sep. 30, 2012 General Partner or Management Company	Sep. 30, 2011 General Partner or Management Company	Sep. 30, 2012 General Partner or Management Company Minimum	Sep. 30, 2012 General Partner or Management Company Partially Owned Properties [Member] Limited Partnerships Minimum 62 Boylston Street	Sep. 30, 2012 Management Company item	Sep. 30, 2011 Management Company	Sep. 30, 2012 Hamilton Company	Sep. 30, 2012 Dexter Park	Sep. 30, 2011 President of Management Company	Sep. 30, 2012 Harold Brown Minimum	Sep. 30, 2012 Harold Brown Maximum	Apr. 30, 2012 HBC	Feb. 29, 2012 HBC	Dec. 31, 2011 HBC	Oct. 31, 2011 HBC	Aug. 31, 2011 HBC	Aug. 31, 2010 HBC	Oct. 31, 2009 HBC	Dec. 31, 2010 HBC	Sep. 30, 2012 HBC	Sep. 30, 2011 HBC	Oct. 28, 2009 HBC
RELATED PARTY TRANSACTIONS
Management fee as a percentage of rental revenue			4.00%														4.00%	2.00%
Management fee as percentage of Linewt			3.00%
Management fees of related party			$ 1,078,000	$ 1,047,000
Costs related to professional services											503,000	601,000
Repairs and maintenance	1,487,272	1,421,084	3,857,918	3,800,836							216,000						53,000
Administrative expense	463,687	411,836	1,362,276	1,237,424							242,000						62,000
Expenses for construction, architectural services and supervision of capital projects											22,000						10,000
Rental commissions											23,000
Amount paid to related party																	552,000
Management fee	360,578	347,833	1,078,188	1,032,069													423,000
Reimbursement to related party for payroll transfers															1,999,000	1,923,000
Number of accounting staff of related party providing bookkeeping and accounting functions															14
Fees for accounting and bookkeeping services															93,750	93,750
Fee for asset management consulting services														56,250					56,250
Number of limited partnerships and limited liability companies in which the entity has invested			9
Percentage of ownership interest						40.00%	50.00%						40.00%							43.20%	57.00%
Number of employees having ownership interest															6
Borrowings																												7,168,000
Interest rate (as a percent)																																6.00%
Term of mortgage loan																												4 years
Notice period demanding early payment																											6 months
Principal paydown of debt upon notice																											2,500,000
Repayment of loan																						918,600							2,500,000
Amount of principal payment																							750,000	1,000,000	1,000,000	1,000,000
Outstanding amount of mortgage loan	138,335,670		138,335,670		139,161,612			138,735,174	138,335,689	139,161,612														1,668,600
Interest paid			$ 5,854,000	$ 6,008,000																										$ 18,960	$ 202,000