VARIABLE INTEREST ENTITIES BORROWINGS (Contractual Commitments) (Details) - RSO [Member] $ in Thousands	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
Long-term Debt	$ 1,880,891
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	175,225
Long-term Debt, Maturing in Year Two	101,753
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	109,661
Long-term Debt, Maturing in Year Five and after	1,494,252
Collateralized Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt	332,382
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	57
Long-term Debt, Maturing in Year Two	0
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	0
Long-term Debt, Maturing in Year Five and after	332,325
CRE - Term Repurchase Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	856,710
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturing in Year Two	0
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	0
Long-term Debt, Maturing in Year Five and after	856,710
Repurchase Agreements Debt [Member]
Debt Instrument [Line Items]
Long-term Debt	276,921
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	175,168
Long-term Debt, Maturing in Year Two	101,753
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	0
Long-term Debt, Maturing in Year Five and after	0
Unsecured Junior Subordinated Debentures [Member]
Debt Instrument [Line Items]
Long-term Debt	51,360
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturing in Year Two	0
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	0
Long-term Debt, Maturing in Year Five and after	51,360
Convertible Debt [Member] | 6% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	109,661
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturing in Year Two	0
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	109,661
Long-term Debt, Maturing in Year Five and after	0
Convertible Debt [Member] | Eight Percent Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	95,115
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturing in Year Two	0
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	0
Long-term Debt, Maturing in Year Five and after	95,115
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	158,742
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year	0
Long-term Debt, Maturing in Year Two	0
Long-term Debt, Maturing in Year Three	0
Long-term Debt, Maturing in Year Four	0
Long-term Debt, Maturing in Year Five and after	$ 158,742