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RELATED PARTY TRANSACTIONS (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  | 6 Months Ended | 12 Months Ended | 6 Months Ended |  | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended |
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 item | Jun. 30, 2012 | Dec. 31, 2012 | Jun. 30, 2013 Limited Partnerships Minimum | Jun. 30, 2013 Limited Partnerships Maximum | Jun. 30, 2013 General Partner or Management Company | Jun. 30, 2012 General Partner or Management Company | Jun. 30, 2013 Management Company item | Jun. 30, 2012 Management Company | Dec. 31, 2012 Management Company | Jun. 30, 2013 Hamilton Company | Jun. 30, 2013 Dexter Park | Jun. 30, 2013 President of Management Company | Jun. 30, 2012 President of Management Company | Jun. 30, 2013 Harold Brown Minimum | Jun. 30, 2013 Harold Brown Maximum | Dec. 15, 2011 HBC Holdings, LLC | Oct. 01, 2011 HBC Holdings, LLC | Aug. 01, 2011 HBC Holdings, LLC | Aug. 17, 2010 HBC Holdings, LLC | Oct. 28, 2009 HBC Holdings, LLC | Apr. 30, 2012 HBC Holdings, LLC | Feb. 29, 2012 HBC Holdings, LLC | Mar. 31, 2012 HBC Holdings, LLC | Dec. 31, 2010 HBC Holdings, LLC | Dec. 31, 2012 HBC Holdings, LLC | Dec. 31, 2011 HBC Holdings, LLC
RELATED PARTY TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fee as percentage of gross receipts rental revenue |  |  | 4.00% |  |  |  |  |  |  |  |  |  | 4.00% | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fee as a percentage of gross receipts rental revenue and laundry income of Linewt, LLC |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fees of related party |  |  | $ 752,000 | $ 718,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Costs related to professional services |  |  |  |  |  |  |  | 453,000 | 328,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repairs and maintenance | 1,515,934 | 1,274,441 | 2,597,213 | 2,326,786 |  |  |  | 154,000 |  |  |  |  | 37,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Administrative expense | 697,238 | 406,665 | 1,149,855 | 892,158 |  |  |  | 184,000 |  |  |  |  | 28,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expenses for construction, architectural services and supervision of capital projects |  |  |  |  |  |  |  | 115,000 |  |  |  |  | 7,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount paid to related party |  |  |  |  |  |  |  |  |  |  |  |  | 373,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Management fee | 374,622 | 361,608 | 743,874 | 708,789 |  |  |  |  |  |  |  |  | 301,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reimbursement to related party for payroll transfers |  |  |  |  |  |  |  |  |  | 1,388,000 | 1,247,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employer contributions in 401K plan |  |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of accounting staff of related party providing bookkeeping and accounting functions |  |  |  |  |  |  |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fees for accounting and bookkeeping services |  |  |  |  |  |  |  |  |  | 62,500 | 62,500 | 125,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Quarterly fee for asset management consulting services |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 37,500 | 37,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of limited partnerships and limited liability companies in which the entity has invested |  |  | 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  | 40.00% | 50.00% |  |  |  |  |  |  |  |  |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 | 1,000,000 | 1,000,000 |  |  |  | 750,000 |  |  |  |
Outstanding amount of mortgage loan | 131,671,632 |  | 131,671,632 |  | 138,055,522 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,668,600
Interest paid |  |  | $ 3,652,000 | $ 3,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,807 |  | $ 18,960 |

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