VARIABLE INTEREST ENTITIES BORROWINGS (Schedule of Linked Transactions) (Details) - RSO [Member] - Long-term Debt, Type [Domain] $ in Thousands	Jun. 30, 2015 USD ($) Loan	Feb. 28, 2015 USD ($)	Dec. 31, 2014 USD ($) Loan
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 282,100
Linked transactions, net at fair value	$ 0		$ 15,367
Weighted Average Borrowing Rate	2.56%		2.09%
Linked Transactions [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 33,397
Linked transactions, net at fair value			48,605
Wells Fargo Bank, National Association [Member] | Linked Transactions [Member] | CMBS - Term Repurchase Facilities [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			4,941
Linked transactions, net at fair value			$ 6,371
Number of Positions as Collateral | Loan			7
Weighted Average Borrowing Rate			1.67%
Repurchase Agreements [Member] | JP Morgan Securities, LLC [Member] | Linked Transactions [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 0
Linked transactions, net at fair value			$ 0
Number of Positions as Collateral | Loan			0
Weighted Average Borrowing Rate			0.00%
Repurchase Agreements [Member] | Wells Fargo Securities, LLC [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 53,057		$ 10,442
Number of Positions as Collateral | Loan	20		1
Weighted Average Borrowing Rate	1.72%		1.66%
Repurchase Agreements [Member] | Wells Fargo Securities, LLC [Member] | Linked Transactions [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 4,108
Linked transactions, net at fair value			$ 6,233
Number of Positions as Collateral | Loan			2
Weighted Average Borrowing Rate			1.37%
Repurchase Agreements [Member] | Deutsche Bank Securities, Inc [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 24,114		$ 33,783
Number of Positions as Collateral | Loan	4		8
Weighted Average Borrowing Rate	1.64%		1.62%
Repurchase Agreements [Member] | Deutsche Bank Securities, Inc [Member] | Linked Transactions [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 24,348
Linked transactions, net at fair value			$ 36,001
Number of Positions as Collateral | Loan			10
Weighted Average Borrowing Rate			1.57%
Repurchase Agreements [Member] | Wells Fargo Bank, National Association [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 56,267		$ 61,189
Number of Positions as Collateral | Loan	170		104
Weighted Average Borrowing Rate	2.75%		2.75%
Repurchase Agreements [Member] | Wells Fargo Bank, National Association [Member] | CMBS - Term Repurchase Facilities [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 29,929		$ 24,967
Number of Positions as Collateral | Loan	35		33
Weighted Average Borrowing Rate	1.38%		1.35%