VARIABLE INTEREST ENTITIES VARIABLE INTEREST ENTITIES (Details) RSO (RSO [Member], USD $)	1 Months Ended		3 Months Ended			0 Months Ended	1 Months Ended	3 Months Ended			3 Months Ended			1 Months Ended		0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended		3 Months Ended					0 Months Ended	1 Months Ended
	May 31, 2013	Oct. 31, 2012	Mar. 31, 2014 credit	Mar. 31, 2013	Dec. 31, 2013	Nov. 16, 2011 Series B Preferred Stock [Member]	Feb. 28, 2011 Investment in RCAM [Member] Entity	Mar. 31, 2014 Investment in RCAM [Member]	Mar. 31, 2013 Investment in RCAM [Member]	Dec. 31, 2013 Investment in RCAM [Member]	Mar. 31, 2014 Entity	Mar. 31, 2013	Mar. 31, 2014 Moselle [Member]	May 31, 2013 Investment in RCAM [Member]	Oct. 31, 2012 Investment in RCAM [Member]	Nov. 16, 2011 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member]	Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member] Position	Dec. 31, 2013 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member]	Nov. 16, 2011 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member] Series A Preferred Stock [Member]	Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member] Series A1 Preferred Stock [Member]	Nov. 16, 2011 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member] Series B Preferred Stock [Member]	Nov. 16, 2011 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member] Series D Preferred Stock [Member]	Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] LEAF [Member] Series E Preferred Stock [Member]	Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] Investment in RCT I and RCT II [Member]	Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] Interest in RCT I [Member]	Mar. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] Interest in RCT II [Member]	Feb. 28, 2011 Variable Interest Entity, Not Primary Beneficiary [Member] Investment in RCAM [Member] Entity	Nov. 16, 2011 Interest in LCC [Member]	Feb. 28, 2014 Class 1 Subordinated Notes [Member] Moselle [Member]	Feb. 28, 2014 Class 2 Subordinated Notes [Member] Moselle [Member]
Variable Interest Entity [Line Items]
Number of consolidated VIEs											9
Number of VIEs for which persons of power are considered a related party group											7
Number Of Credits Supported In VIEs			2
Financial support provided to VIEs											$ 539,000	$ 1,200,000
Shares received in equity method transaction (in shares)																			31,341	3,682	4,872	2,364	4,445
Preferred stock, coupon authorized						8.00%
Ownership percentage in VIE	68.30%															26.70%	27.50%							100.00%
Investments in unconsolidated entities			62,053,000		69,069,000											36,300,000	40,400,000	41,000,000						1,500,000
Gain (Loss) on Sale of Previously Unissued Stock by Equity Investee																												(2,200,000)
Payments to Acquire Equity Method Investments													41,500,000							3,700,000			4,400,000
Percentage of Outstanding Notes Purchased																													100.00%	67.90%
Variable interest entity, number of board positions held by the company																	2
Variable interest entity, total number of board positions																	6
Percentage of total value of trusts owned																									3.00%	3.00%
Borrowings			1,502,266,000		1,320,015,000																				25,800,000	25,800,000
Bank loan assets under management							1,900,000,000
Number of CLOs held by purchased entity							5																				4
Acquisition							22,500,000
Intangible assets			11,283,000		11,822,000			10,800,000		11,200,000
Fee income			$ 2,756,000	$ 1,410,000				$ 1,700,000	$ 1,400,000
Preferred equity acquired		66.60%												68.30%	66.60%