VARIABLE INTEREST ENTITIES BORROWINGS (Whitney CLO I) (Details) RSO (RSO [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Oct. 31, 2012
Whitney CLO I Senior Notes [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.82%
Whitney CLO I Senior Notes [Member] | Senior Notes Class A-1L [Member]
Debt Instrument [Line Items]
Face amount of debt issued		$ 48,800,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	0.32%
Repayments of debt	15,500,000
Whitney CLO I Senior Notes [Member] | Senior Notes Class A-1LA [Member]
Debt Instrument [Line Items]
Face amount of debt issued		26,500,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	0.29%
Repayments of debt	19,900,000
Whitney CLO I Senior Notes [Member] | Senior Notes Class A-1LB [Member]
Debt Instrument [Line Items]
Face amount of debt issued		36,500,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	0.45%
Whitney CLO I Senior Notes [Member] | Senior Notes Class A-2F [Member]
Debt Instrument [Line Items]
Face amount of debt issued		19,750,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	5.19%
Whitney CLO I Senior Notes [Member] | Senior Notes Class A-2L [Member]
Debt Instrument [Line Items]
Face amount of debt issued		15,000,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	0.57%
Whitney CLO I Senior Notes [Member] | Senior Notes Class A-3L [Member]
Debt Instrument [Line Items]
Face amount of debt issued		25,000,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	1.05%
Whitney CLO I Senior Notes [Member] | Senior Notes Class B-1LA [Member]
Debt Instrument [Line Items]
Face amount of debt issued		23,500,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	2.10%
Whitney CLO I Senior Notes [Member] | Senior Notes Class B-1LB [Member]
Debt Instrument [Line Items]
Face amount of debt issued		14,360,000
Description of variable rate basis	LIBOR
Basis spread on variable rate	1.00%
Whitney CLO I, Ltd. [Member]
Debt Instrument [Line Items]
Purchased equity interests		$ 20,900,000
Purchased equity interests discount, percentage		42.50%
Ownership interests in variable interest entities (in hundredths)		67.00%