LOANS RECEIVABLE AND OTHER INVESTMENTS - Schedule of Loans Receivable and Other Investments (Details) $ in Thousands	Jun. 30, 2015 USD ($) loan	Dec. 31, 2014 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Quantity | loan	14
Loans Receivable, Principal Balance	$ 255,117
Loans Receivable, Book Value	$ 255,836	$ 235,176
Loans Receivable, Weighted Average Contractual Interest Rate / Rate of Return	8.40%
Loans Receivable, Weighted Average Annualized Effective Interest Rate / Rate of Return	8.30%
Preferred Equity Investment, Quantity | loan	8
Preferred Equity Investment, Principal Balance	$ 22,332	16,125
Preferred Equity Investment, Book Value	$ 22,671	16,407
Preferred Equity Investment, Weighted Average Contractual Interest Rate / Rate of Return	13.00%
Preferred Equity Investment, Weighted Average Annualized Effective Interest Rate / Rate of Return	13.00%
Total Investments, Quantity | loan	22
Total Investments, Principal Balance	$ 277,449
Total Investments, Book Value	$ 278,507	251,583
Total Investments, Weighted Average Contractual Interest Rate / Rate of Return	8.80%
Total Investments, Weighted Average Annualized Effective Interest Rate / Rate of Return	8.70%
Mortgage Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Quantity | loan	6
Loans Receivable, Principal Balance	$ 161,934
Loans Receivable, Book Value	$ 162,258	144,383
Loans Receivable, Weighted Average Contractual Interest Rate / Rate of Return	8.40%
Loans Receivable, Weighted Average Annualized Effective Interest Rate / Rate of Return	8.20%
Construction Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Quantity | loan	3
Loans Receivable, Principal Balance	$ 70,910
Loans Receivable, Book Value	$ 71,170	65,525
Loans Receivable, Weighted Average Contractual Interest Rate / Rate of Return	7.70%
Loans Receivable, Weighted Average Annualized Effective Interest Rate / Rate of Return	7.60%
Mezzanine Investments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Quantity | loan	2
Loans Receivable, Principal Balance	$ 19,819
Loans Receivable, Book Value	$ 19,867	21,491
Loans Receivable, Weighted Average Contractual Interest Rate / Rate of Return	11.30%
Loans Receivable, Weighted Average Annualized Effective Interest Rate / Rate of Return	11.10%
Pre-Development Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Receivable, Quantity | loan	3
Loans Receivable, Principal Balance	$ 2,454
Loans Receivable, Book Value	$ 2,541	$ 3,777
Loans Receivable, Weighted Average Contractual Interest Rate / Rate of Return	9.00%
Loans Receivable, Weighted Average Annualized Effective Interest Rate / Rate of Return	7.50%