LOANS RECEIVABLE (Details) (USD $)	1 Months Ended	6 Months Ended			6 Months Ended	1 Months Ended				1 Months Ended
	May 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Secured Loans Receivable loan	Dec. 31, 2012 Eight Percent Loan Receivable Maturing in 2017 [Member]	Jul. 25, 2013 Eight Percent Loan Receivable Maturing in 2017 [Member] Subsequent Event	Jul. 31, 2013 Eight Percent Loan Receivable Maturing in 2017 [Member] Subsequent Event	Jul. 31, 2013 Senior Secured Portion Sold Eight Percent Loan Receivable Maturing in 2017 [Member] Subsequent Event	May 31, 2013 Twelve Percent Loan Receivable Maturing in 2017 [Member]	Dec. 31, 2012 Twelve Percent Loan Receivable Maturing in 2017 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from loans receivable		$ 218,043,000	$ 33,223,000		$ 68,400,000
Number of secured loans repaid					4
Payments to Acquire Mortgage Backed Securities (MBS) categorized as Available-for-sale	21,000,000
Available-for-sale Securities, Amortized Cost Basis		21,100,000
Secured loans receivable, net		514,500,000		697,100,000
Loans receivable, aggregate principal amount						375,000,000	183,000,000				50,000,000
Loans receivable, interest rate						8.00%		9.40%	4.50%		12.00%
Proceeds from Sale of Loans Receivable							$ 66,400,000			$ 25,000,000