NOTES RECEIVABLE Schedule of Notes Receivable (Details) (USD $)		1 Months Ended	9 Months Ended									9 Months Ended
	Sep. 30, 2012	Aug. 31, 2012 Fund III Opportunity Funds Undeveloped land Farmingdale, New York	Sep. 30, 2012 Zero Coupon Loan	Sep. 30, 2012 Mezzanine Loan Due 2013	Sep. 30, 2012 Mezzanine Loan Due With Capital Event	Sep. 30, 2012 First Mortgage Loan Due 2012	Sep. 30, 2012 First Mortgage Loan Due 2013	Sep. 30, 2012 First Mortgage Loan Due on Demand Second	Sep. 30, 2012 First Mortgage Loan Due 2012 Second extension_options	Sep. 30, 2012 Construction Loans	Sep. 30, 2012 Individually Less Than 3%	Sep. 30, 2012 Individually Less Than 3% Minimum	Sep. 30, 2012 Individually Less Than 3% Maximum	Sep. 30, 2012 First Mortgage Loan, Secured By Property Brooklyn, New York	Apr. 30, 2012 First Mortgage Loan, Secured By Property Brooklyn, New York
Mortgage Loans on Real Estate [Line Items]
Effective interest rate			24.00%	10.00%	15.00%	12.00%	9.20%	5.30%	6.00%	20.50%		10.00%	12.00%
Prior liens			$ 166,200,000	$ 85,835,000	$ 11,925,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 37,623,000
Carrying amount of mortgages	78,826,000		3,861,000	9,089,000	3,834,000	19,500,000	3,000,000	18,500,000	12,609,000	5,400,000	3,033,000			23,500,000
Noncash or Part Noncash Acquisition, Debt Assumed		10,000,000
Number of extension options (in extension options)									2
Period of extension options (in months)									6 months
Period of extension options, second period (in months)									6 months
Face amount of mortgages															$ 18,500,000
Mortgage loans on real estate, interest rate														16.00%