VARIABLE INTEREST ENTITIES BORROWINGS (Apidos CLO VIII) (Details) RSO (Apidos CLO VIII Senior Notes [Member], USD $)				12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2012 RSO [Member]	Dec. 31, 2011 RSO [Member]	Oct. 31, 2011 RSO [Member]	Dec. 31, 2012 RSO [Member] Senior Notes Class A-1 [Member]	Oct. 31, 2011 RSO [Member] Senior Notes Class A-1 [Member]	Dec. 31, 2012 RSO [Member] Senior Notes Class A-2 [Member]	Oct. 31, 2011 RSO [Member] Senior Notes Class A-2 [Member]	Oct. 31, 2011 RSO [Member] Senior Notes Class B-1 [Member]	Dec. 31, 2012 RSO [Member] Senior Notes Class B-2 [Member]	Oct. 31, 2011 RSO [Member] Senior Notes Class B-2 [Member]	Dec. 31, 2012 RSO [Member] Senior Notes Class C [Member]	Oct. 31, 2011 RSO [Member] Senior Notes Class C [Member]	Dec. 31, 2012 RSO [Member] Senior Notes Class B [Member]	Dec. 31, 2012 RSO [Member] Senior Notes Class D [Member]	Oct. 31, 2011 RSO [Member] Senior Notes Class D [Member]	Oct. 31, 2011 RCC Commercial [Member]
Debt Instrument [Line Items]
Closing transaction amount			$ 350,000,000
Face amount of debt issued			317,600,000		231,200,000		35,000,000	17,300,000		6,800,000		14,100,000			13,200,000
Discount to investors			4.40%
Purchased equity interests																$ 15,000,000
Percentage of senior note acquired from VIE (in hundredths)																43.00%
Percentage of senior note acquired by unrelated third party (in hundredths)			57.00%
Description of variable rate basis				LIBOR		LIBOR			LIBOR		LIBOR		LIBOR	LIBOR
Basis spread on variable rate				1.50%		2.00%			2.50%		3.10%		2.50%	4.50%
Weighted average interest rate on all notes issued to outside investors and net of repurchased notes (in hundredths)	2.16%	2.42%