VARIABLE INTEREST ENTITIES BORROWINGS (Apidos Cinco CDO) (Details) RSO (Apidos Cinco CDO Senior Notes [Member], USD $)				5 Months Ended	12 Months Ended		12 Months Ended		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]	May 31, 2007 RSO [Member]	May 31, 2007 RCC Commercial [Member]	Dec. 31, 2012 Senior Notes Class A-1 [Member] RSO [Member]	May 31, 2007 Senior Notes Class A-1 [Member] RSO [Member]	Dec. 31, 2012 Senior Notes Class A-2a [Member] RSO [Member]	May 31, 2007 Senior Notes Class A-2a [Member] RSO [Member]	Dec. 31, 2012 Senior Notes Class A-2b [Member] RSO [Member]	May 31, 2007 Senior Notes Class A-2b [Member] RSO [Member]	Dec. 31, 2012 Senior Notes Class A-3 [Member] RSO [Member]	May 31, 2007 Senior Notes Class A-3 [Member] RSO [Member]	Dec. 31, 2012 Senior Notes Class B [Member] RSO [Member]	May 31, 2007 Senior Notes Class B [Member] RSO [Member]	Dec. 31, 2012 Senior Notes Class C [Member] RSO [Member]	May 31, 2007 Senior Notes Class C [Member] RSO [Member]	Dec. 31, 2012 Senior Notes Class D [Member] RSO [Member]	May 31, 2007 Senior Notes Class D [Member] RSO [Member]	May 31, 2007 Apidos Cinco CDO Ltd [Member] RSO [Member]
Debt Instrument [Line Items]
Closing transaction amount			$ 350,000,000
Face amount of debt issued						37,500,000		200,000,000		22,500,000		19,000,000		18,000,000		14,000,000		11,000,000	322,000,000
Payments by parent to acquire notes issued by VIE				$ 28,000,000
Percentage of senior notes acquired by the parent				100.00%
Description of variable rate basis					LIBOR		LIBOR		LIBOR		LIBOR		LIBOR		LIBOR		LIBOR
Basis spread on variable rate					0.24%		0.23%		0.32%		0.42%		0.80%		2.25%		4.25%
Weighted average interest rate on all notes issued to outside investors and net of repurchased notes (in hundredths)	0.82%	0.95%