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ACQUISITION AND DISPOSITION OF REAL ESTATE AND DISCONTINUED OPERATIONS Acquisitions (Details) (USD $) | 6 Months Ended | 1 Months Ended |  |  |  |  |  |
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Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 Core Portfolio | Jun. 30, 2013 Fund IV | Apr. 30, 2012 Brooklyn, New York Fund III sqft | Mar. 31, 2013 664 North Michigan Avenue [Member] Chicago Illinois Core Portfolio sqft | Jun. 30, 2013 Eight-Twelve East Walton Chicago Illinois Core Portfolio sqft | Feb. 28, 2013 Shopping Center Brooklyn, New York Fund III | Jun. 30, 2013 Twenty Eight Nineteen Kennedy Boulevard North Bergen, New Jersey Fund IV sqft | Jun. 30, 2013 Promenade at Manassas Manassas, Virginia Fund IV sqft | Jun. 30, 2013 Acquisitions in 2013 Preliminary Purchase Price Allocation | Dec. 31, 2012 Acquisitions in 2012 Preliminary Purchase Price Allocation | Jun. 30, 2013 Acquisitions in 2012 Scenario, Adjustment | Jun. 30, 2013 Acquisitions in 2012 Finalized Purchase Price Allocation
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Square Footage of Real Estate Property (in square feet) |  |  |  |  | 79,526 | 18,141 | 8,244 |  | 53,680 | 265,442 |  |  |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  |  |  |  | $ 86,600,000 | $ 22,500,000 |  | $ 9,000,000 | $ 38,000,000 |  |  |  |
Business Combination, Acquisition Related Costs |  |  | 1,000,000 | 1,400,000 |  |  |  |  |  |  |  |  |  |
Payments to Acquire Notes Receivable | 0 | 34,500,000 |  |  | 18,500,000 |  |  |  |  |  |  |  |  |
Debt instrument face amount |  |  |  |  | 23,000,000 |  |  |  |  |  |  |  |  |
Consolidated Joint Venture, Ownership Percentage |  |  |  |  |  |  |  | 99.00% | 98.00% | 99.00% |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |  |  |  |  |  |  |  |  |  |  |  |  |
Land |  |  |  |  |  |  |  |  |  |  | 39,563,000 | 11,390,000 | 2,876,000 | 14,266,000
Buildings and Improvements |  |  |  |  |  |  |  |  |  |  | 136,009,000 | 38,510,000 | (2,330,000) | 36,180,000
Acquisition-related intangible assets (in Acquired lease intangibles, net) |  |  |  |  |  |  |  |  |  |  |  | 0 | 2,623,000 | 2,623,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Liabilities |  |  |  |  |  |  |  |  |  |  |  | 0 | (1,852,000) | (1,852,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Above-Below Market Debt |  |  |  |  |  |  |  |  |  |  |  |  | (1,317,000) | (1,317,000)
Total consideration |  |  |  |  |  |  |  |  |  |  | $ 175,572,000 | $ 49,900,000 | $ 0 | $ 49,900,000

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- Definition Percentage of voting equity interests acquired in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7659399&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 59 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 39, 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The net amount recognized as of the acquisition date for the aggregate identifiable assets acquired in excess of or 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=9154965&loc=d3e2207-128464 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The cash outflow to acquire an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among myriad other features and characteristics. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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