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
	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.