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ACQUISITION OF REAL ESTATE AND DISCONTINUED OPERATIONS Acquisitions (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013
Business Acquisition [Line Items] |  |
Gross leasable area | 394,323 |
Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 67,360 |
Purchase Price | $ 145,700,000 |
Acquisition costs | 1,500,000 |
Fund IV |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 157,383 |
Purchase Price | 26,000,000 |
Acquisition costs | 2,500,000 |
11 E Walton | Chicago, IL | Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 6,738 |
Percent Owned | 100.00% |
Purchase Price | 44,000,000 |
61 Main Street | Westport, CT | Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 3,400 |
Percent Owned | 100.00% |
Purchase Price | 7,300,000 |
865 W North Avenue | Chicago, IL | Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 16,000 |
Percent Owned | 100.00% |
Purchase Price | 14,800,000 |
252-256 Greenwich Avenue | Greenwich, CT | Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 9,172 |
Percent Owned | 100.00% |
Purchase Price | 24,500,000 |
152-154 Spring Street | New York, NY | Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 2,936 |
Percent Owned | 90.00% |
Purchase Price | 38,000,000 |
2520 Flatbush Avenue | Brooklyn, NY | Core Portfolio |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 29,114 |
Percent Owned | 100.00% |
Purchase Price | 17,100,000 |
Broughton Street Portfolio (18 Properties) | Savannah, GA | Fund IV |  |
Business Acquisition [Line Items] |  |
Gross leasable area | 157,383 |
Percent Owned | 50.00% |
Purchase Price | 26,000,000 |
Number of properties acquired | 18,000 |
Acquisitions In 2014 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |
Land | 44,027,000 |
Buildings and improvements | 127,579,000 |
Total consideration | 171,606,000 |
Acquisitions in 2013 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |
Land | 49,936,000 | 41,700,000
Buildings and improvements | 121,978,000 | 142,618,000
Acquisition-related intangible assets (in Acquired lease intangibles, net) | 15,716,000 | 0
Acquisition-related intangible liabilities (in Acquired lease intangibles, net) | (3,312,000) | 0
Total consideration | 184,318,000 | 184,318,000
Adjustments [Abstract] |  |
Land | 8,236,000 |
Buildings and improvements | (20,640,000) |
Acquisition-related intangible assets (in Acquired lease intangibles, net) | 15,716,000 |
Acquisition-related intangible liabilities (in Acquired lease intangibles, net) | (3,312,000) |
Total consideration | $ 0 |

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- Definition Amount of real estate acquired, at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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