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
	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.