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NOTES RECEIVABLE, PREFERRED EQUITY, AND OTHER REAL ESTATE RELATED INVESTMENTS Schedule of Notes Receivable (Details) (USD $) | 9 Months Ended | 12 Months Ended |  | 1 Months Ended |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended |  |  |  |  |  |  |  |  |  |  | 1 Months Ended |  |  |  |  | 12 Months Ended |  |  | 1 Months Ended |  |
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Sep. 30, 2013 loan | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Jan. 31, 2013 Fund III [Member] | Feb. 28, 2013 Brooklyn, New York [Member] Fund III [Member] | Dec. 31, 2012 Brooklyn, New York [Member] Fund III [Member] | Dec. 31, 2013 First Mortgage, 5.5% Loan Due 2014 [Member] | Dec. 31, 2012 First Mortgage, 5.5% Loan Due 2014 [Member] | Dec. 31, 2013 First Mortgage, 7.7% Loan Due 2015 [Member] | Dec. 31, 2012 First Mortgage, 7.7% Loan Due 2015 [Member] | Dec. 31, 2013 Zero Coupon [Member] | Dec. 31, 2012 Zero Coupon [Member] | Dec. 31, 2013 Preferred Equity, 8.1% Loan, Due 2017 [Member] | Dec. 31, 2012 Preferred Equity, 8.1% Loan, Due 2017 [Member] | Dec. 31, 2013 Mezzanine, 15% Due 2020 [Member] | Dec. 31, 2012 Mezzanine, 15% Due 2020 [Member] | Dec. 31, 2013 First Mortgage Loan, 8.0% Loan, Due On Demand [Member] | Nov. 30, 2013 First Mortgage Loan, 8.0% Loan, Due On Demand [Member] | Dec. 31, 2012 First Mortgage Loan, 8.0% Loan, Due On Demand [Member] | Dec. 31, 2013 Mezzanine Loan, 10.0% Loan, Due On Demand [Member] loan borrower | Dec. 31, 2012 Mezzanine Loan, 10.0% Loan, Due On Demand [Member] | Dec. 31, 2013 First Mortgage Loan, 5.3% Due On Demand [Member] | Dec. 31, 2012 First Mortgage Loan, 5.3% Due On Demand [Member] | Dec. 31, 2013 Mezzanine Loan, 15.0% Loan, Due Upon Capital Event [Member] | Dec. 31, 2012 Mezzanine Loan, 15.0% Loan, Due Upon Capital Event [Member] | Dec. 31, 2013 Construction [Member] | Dec. 31, 2012 Construction [Member] | Nov. 30, 2013 First Mortgage Loan, 12.0% Loan, Due 2013 [Member] | Dec. 31, 2013 First Mortgage Loan, 12.0% Loan, Due 2013 [Member] | Dec. 31, 2012 First Mortgage Loan, 12.0% Loan, Due 2013 [Member] | Dec. 31, 2013 First Mortgage Loan, 6.0% Loan, Due 2013 [Member] | Dec. 31, 2012 First Mortgage Loan, 6.0% Loan, Due 2013 [Member] | Dec. 31, 2013 Individually Less Than 3%, Variable Interest Rate Due 2014 to Capital Event [Member] loan | Dec. 31, 2012 Individually Less Than 3%, Variable Interest Rate Due 2014 to Capital Event [Member] | Dec. 31, 2013 Individually Less Than 3%, Variable Interest Rate Due 2014 to Capital Event [Member] Maximum [Member] | Mar. 31, 2013 Construction Loans [Member] | Jan. 31, 2013 First Mortgage, 11% Loan Due 2014 [Member] | Nov. 30, 2013 First Mortgage Loan, 9.0% Loan Due 2013 [Member] | Dec. 31, 2013 Master Lease Agreement, LIBOR Plus 2.5% Loan, Due 2020 [Member]
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective interest rate |  |  |  |  |  |  |  |  | 5.50% |  |  | 7.70% |  |  | 24.00% |  |  | 8.10% |  |  | 15.00% |  |  | 8.00% |  |  |  | 0.00% |  | 5.30% |  | 15.00% |  | 20.50% |  |  |  | 12.00% |  |  | 6.00% |  |  | 2.50% |  |  | 17.50% |  |  | 9.00% |
First Priority Liens |  |  |  |  |  |  |  |  | $ 0 | [1] |  | $ 0 | [1] |  | $ 166,200,000 | [1] |  | $ 20,855,000 | [1] |  | $ 0 | [1] |  | $ 0 | [1] |  |  | $ 89,566,000 |  | $ 0 |  | $ 16,668,000 |  | $ 0 | [1] |  |  | $ 0 | [1] |  | $ 0 | [1] |  | $ 37,623,000 | [1] |  |  |  |  |  |
Net Carrying Amount of Notes Receivable |  | 126,656,000 | 129,278,000 | 59,989,000 | 89,202,000 |  |  | 18,500,000 | 42,000,000 |  | 25,000,000 | 12,000,000 |  | 0 | 4,431,000 |  | 3,961,000 | 13,000,000 |  | 0 | 30,879,000 |  | 30,879,000 | 6,400,000 |  | 8,000,000 | 8,000,000 | 9,089,000 | 9,089,000 | 0 | 18,500,000 | 3,834,000 | 3,834,000 | 0 |  | 5,400,000 | 12,200,000 | 0 |  | 12,333,000 | 0 |  | 10,250,000 | 5,023,000 |  | 2,032,000 |  |  |  | 25,000,000 | 3,000,000
Number of cross-collateralized loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of borrowers |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |
Number of non-performing loans | 6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Mortgage Loans on Real Estate, Face Amount of Mortgages |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,700,000 |  |  |  |  |  |  |
Face amount of mortgages, reserved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,700,000 |  |  |  |  |  |  |
Proceeds from notes receivable |  | 29,583,000 | 25,388,000 | 56,519,000 |  | 2,500,000 | 13,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,600,000 |  |  |  |  |  |  |  |  |  |  |  |  | 12,500,000 |  |  |  |  |  |  |  |  |  |  |  | 10,300,000 |  |
Mortgage Loans on Real Estate, Collections of Principal |  | 29,583,000 | 25,388,000 | 56,517,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,400,000 |  |  |
Mortgage Loans on Real Estate, Accrued Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans Receivable, Basis Spread on Variable Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50%
Mortgage loans on real estate, nonperforming loans, amount | 18,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for Notes, Loans and Financing Receivable | $ 3,681,000 | $ 3,681,000 | $ 3,681,000 | $ 3,276,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | The effective interest rate includes origination and exit fees.

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- Definition Mortgage Loans on Real Estate, Accrued Interest + References No definition available. + Details
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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, Face Amount of Mortgages, Reserved + 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 A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + 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 Amount of the contractual principal due at the origination of the mortgage loan (face amount). + 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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- 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 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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