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NOTES RECEIVABLE AND PREFERRED EQUITY INVESTMENTS, NET Schedule of Notes Receivable (Details) (USD $) | 6 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 Months Ended |  |  | 1 Months Ended |  | 1 Months Ended
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Jun. 30, 2014 loan | Jun. 30, 2013 | Dec. 31, 2013 | Jun. 30, 2014 Construction Loan, 7.0% Percent, Due 2015 | Dec. 31, 2013 Construction Loan, 7.0% Percent, Due 2015 | Jun. 30, 2014 First Mortgage Loan, 6% Loan Due On Demand | Dec. 31, 2013 First Mortgage Loan, 6% Loan Due On Demand | Jun. 30, 2014 Mezzanine Loan, 10% Due On Demand loan borrower | Dec. 31, 2013 Mezzanine Loan, 10% Due On Demand | Jun. 30, 2014 First Mortgage Loan, 5.5% Loan Due 2016 | Dec. 31, 2013 First Mortgage Loan, 5.5% Loan Due 2016 | Jun. 30, 2014 Zero Coupon Loan | Dec. 31, 2013 Zero Coupon Loan | Jun. 30, 2014 Mezzanine Loan, 15% Due 2020 | Dec. 31, 2013 Mezzanine Loan, 15% Due 2020 | Jun. 30, 2014 Mezzanine Loan Due With Capital Event | Dec. 31, 2013 Mezzanine Loan Due With Capital Event | Jun. 30, 2014 Preferred Equity, 8.1% Loan, Due 2017 | Dec. 31, 2013 Preferred Equity, 8.1% Loan, Due 2017 | Jun. 30, 2014 Mezzanine Loan, 12.7% Loan, Due 2015 | Apr. 30, 2014 Mezzanine Loan, 12.7% Loan, Due 2015 | Dec. 31, 2013 Mezzanine Loan, 12.7% Loan, Due 2015 | Apr. 30, 2014 Mortgage Loan, Libor Plus 3.75% Loan, Due 2024 | Jun. 30, 2014 Preferred Equity, 13.5% Loan, Due 2016 | May 31, 2014 Preferred Equity, 13.5% Loan, Due 2016 | Dec. 31, 2013 Preferred Equity, 13.5% Loan, Due 2016 | Jun. 30, 2014 Mezzanine Loan, 2.5% Plus LIBOR Variable Interest Rate, Due 2020 | Dec. 31, 2013 Mezzanine Loan, 2.5% Plus LIBOR Variable Interest Rate, Due 2020 | Jun. 30, 2014 Mezzanine Loan, 2.5% Plus LIBOR Variable Interest Rate, Due 2020 LIBOR | Jun. 30, 2014 Individually Less Than 3 Percent, Variable Interest Rate Due 2014 to Capital Event loan | Dec. 31, 2013 Individually Less Than 3 Percent, Variable Interest Rate Due 2014 to Capital Event | Jun. 30, 2014 Individually Less Than 3 Percent, Variable Interest Rate Due 2014 to Capital Event Minimum | Jun. 30, 2014 Individually Less Than 3 Percent, Variable Interest Rate Due 2014 to Capital Event Maximum | Jan. 31, 2014 First Mortgage Loan, 8.0% Loan Due 2013 | Apr. 30, 2014 Mezzanine Loan | Jan. 31, 2014 Mezzanine Loan | Apr. 30, 2014 Mezzanine Loan LIBOR | Apr. 30, 2014 152-154 Spring Street
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net carrying amount | $ 96,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate |  |  |  | 7.70% | [1] |  | 6.00% | [1] |  | 10.00% | [1],[2] |  |  | 5.50% | [1] |  | 24.00% | [1],[3] |  |  | 15.00% | [1] |  | 15.00% | [1] |  | 8.10% | [1] |  | 12.70% | [1] | 12.70% |  |  | 13.50% | [1] | 13.50% | [1] |  |  |  |  |  |  |  |  | 2.70% | [1] | 11.60% | [1] |  |  |  |  |
Prior liens |  |  |  | 0 |  |  | 0 |  |  | 89,566,000 | [2] |  |  | 0 |  |  | 166,200,000 | [3] |  |  | 0 |  |  | 0 |  |  | 20,855,000 |  |  | 0 |  |  |  |  | 0 |  |  |  |  | 0 |  |  | 0 | [4] |  |  |  |  |  |  |  |  |  |  |
Carrying amount of mortgages | 96,307,000 |  | 126,656,000 | 12,000,000 |  | 12,000,000 | 0 |  | 6,400,000 | 9,089,000 | [2] | 9,089,000 | [2] | 4,000,000 |  | 42,000,000 | 4,708,000 | [3] | 4,431,000 | [3] | 30,879,000 |  | 30,879,000 | 0 |  | 3,834,000 | 13,000,000 |  | 13,000,000 | 13,000,000 |  | 13,000,000 | 0 | 1,900,000 | 4,000,000 |  | 4,000,000 |  | 0 | 3,000,000 | 3,000,000 |  | 2,631,000 | [4] | 2,023,000 | [4] |  |  |  |  |  | 8,500,000 |  |  |
Loans receivable, basis spread on variable rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |  |  |  |  |  |  |  |  |  | 3.75% |
Number of cross collateralized loans |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of borrowers |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from notes receivable | 11,990,000 | 5,529,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,400,000 | 10,300,000 | 1,400,000 |  |
Mortgage loans on real estate, collections of principal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000 |  |
Income related to the payoff of notes receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000 |  |
Mortgage loans on real estate, exchange of mortgage for investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,000,000
Mortgage loans on real estate, write-down or reserve, amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |  |  |
Number of non-performing loans | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage loans on real estate, nonperforming loans, amount | $ 9,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | ncludes origination and exit fees
[2] | Comprised of three cross-collateralized loans from one borrower, which are non-performing
[3] | The principal balance for this accrual only loan is increased by the interest accrued
[4] | Consists of three loans as of June 30, 2014.

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- Definition Mortgage Loans on Real Estate, Effective Interest Rate + References No definition available. + Details
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- Definition Mortgage Loans on Real Estate, Exchange of Mortgage for Investment + References No definition available. + Details
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- Definition Mortgage Loans On Real Estate, Net Carrying Amount + References No definition available. + Details
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- Definition Mortgage Loans on Real Estate, Nonperforming Loans, Amount + References No definition available. + Details
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- Definition Mortgage Loans on Real Estate, Number of Borrowers + References No definition available. + Details
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- Definition Mortgage Loans on Real Estate, Number of Cross Collateralized Loans + References No definition available. + Details
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- Definition Mortgage Loans on Real Estate, Number of Non-Performing Loans + References No definition available. + Details
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- Definition Reflects the net positive or negative amount derived from subtracting from net proceeds of sale the carrying amounts, net of allocated reserves, of notes receivable transferred to a third party in a transaction that qualifies for sales treatment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107425-111719 + Details
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- Definition The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin. + References No definition available. + Details
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- Definition The carrying amount of the outstanding balance due under the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition The amount of principal collected on mortgage loans on real estate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition Indicates the number of mortgages under each classification. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.3) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Paragraph 3 -Article 12 + Details
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- Definition Amount of prior lien on the real estate that secures the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition Amount of reserve for write-down of a mortgage loan on real estate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.7) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation. + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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