LOANS RECEIVABLE AND OTHER INVESTMENTS - Loans Receivable and Other Investments (Details) $ in Thousands	Dec. 31, 2017 USD ($) Investment	Dec. 31, 2016 USD ($)
Loans Receivable:
Quantity \| Investment	22
Principal Balance	$ 91,280
Book Value	$ 66,004	$ 53,596
Weighted Average Contractual Interest Rate / Rate of Return	9.40%
Weighted Average Annualized Effective Interest Rate / Rate of Return	11.60%
Loan loss reserve	$ (97)	(2,750)
Loans Receivable, Net Amount	$ 65,907	50,846
Preferred Equity
Quantity \| Investment	12
Principal Balance	$ 48,035	44,882
Book Value	$ 48,483	45,190
Weighted Average Contractual Interest Rate / Rate of Return	12.60%
Weighted Average Annualized Effective Interest Rate / Rate of Return	12.60%
Total Quantity \| Investment	34
Total Principal Balance	$ 139,315
Total Book Value	$ 114,390	96,036
Total Weighted Average Contractual Interest Rate / Rate of Return	10.50%
Total Weighted Average Annualized Effective Interest Rate / Rate of Return	12.00%
Mortgage
Loans Receivable:
Quantity \| Investment	2
Principal Balance	$ 13,366
Book Value	$ 12,351	38,262
Weighted Average Contractual Interest Rate / Rate of Return	9.90%
Weighted Average Annualized Effective Interest Rate / Rate of Return	11.30%
Construction
Loans Receivable:
Quantity \| Investment	2
Principal Balance	$ 2,667
Book Value	$ 2,733	842
Weighted Average Contractual Interest Rate / Rate of Return	8.00%
Weighted Average Annualized Effective Interest Rate / Rate of Return	7.70%
Mezzanine
Loans Receivable:
Quantity \| Investment	2
Principal Balance	$ 32,468
Book Value	$ 10,239	9,656
Weighted Average Contractual Interest Rate / Rate of Return	10.20%
Weighted Average Annualized Effective Interest Rate / Rate of Return	19.20%
Pre-development
Loans Receivable:
Quantity \| Investment	1
Principal Balance	$ 2,357
Book Value	$ 2,357	4,023
Weighted Average Contractual Interest Rate / Rate of Return	9.00%
Weighted Average Annualized Effective Interest Rate / Rate of Return	8.40%
Other
Loans Receivable:
Quantity \| Investment	15
Principal Balance	$ 40,422
Book Value	$ 38,324	0
Weighted Average Contractual Interest Rate / Rate of Return	8.80%
Weighted Average Annualized Effective Interest Rate / Rate of Return	10.10%
Debtor-in-possession
Loans Receivable:
Quantity \| Investment	0
Principal Balance	$ 0
Book Value	$ 0	$ 813

Investments, Weighted Average Contractual Rate

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Loans And Leases Receivable, Effective Interest Rate

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Loans and Leases Receivable, Number of Loans

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Number of Investments

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Preferred Equity Investment, Carrying Amount

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Preferred Equity Investment, Face Value

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For investments which are quantified by principal amount, the principle balance held at close of period.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes loans held for sale. Excludes loans and leases covered under loss sharing agreements.

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