VARIABLE INTEREST ENTITIES - FINANCING RECEIVABLES (Credit Risk Profiles of Commercial Real Estate Loans) (Details) RSO (RSO [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Financing Receivables [Line Items]
Loans and receivables	$ 1,935,793	$ 1,377,037
Whole Loans [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	1,263,592	745,789
Whole Loans [Member] | Rating 1 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	1,231,092	680,718
Whole Loans [Member] | Rating 2 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	32,500	32,500
Whole Loans [Member] | Rating 3 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	32,571
Whole Loans [Member] | Rating 4 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
Whole Loans [Member] | Held for Sale [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
B Notes [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	16,072	16,205
B Notes [Member] | Rating 1 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	16,072	16,205
B Notes [Member] | Rating 2 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
B Notes [Member] | Rating 3 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
B Notes [Member] | Rating 4 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
B Notes [Member] | Held for Sale [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
Mezzanine Loans [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	67,366	64,317
Mezzanine Loans [Member] | Rating 1 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	45,432	51,862
Mezzanine Loans [Member] | Rating 2 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	21,934	12,455
Mezzanine Loans [Member] | Rating 3 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
Mezzanine Loans [Member] | Rating 4 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
Mezzanine Loans [Member] | Held for Sale [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
Commercial Portfolio Segment [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	1,347,030	826,311
Commercial Portfolio Segment [Member] | Rating 1 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	1,292,596	748,785
Commercial Portfolio Segment [Member] | Rating 2 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	54,434	44,955
Commercial Portfolio Segment [Member] | Rating 3 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	32,571
Commercial Portfolio Segment [Member] | Rating 4 [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	0	0
Commercial Portfolio Segment [Member] | Held for Sale [Member]
Schedule Of Financing Receivables [Line Items]
Loans and receivables	$ 0	$ 0