BORROWINGS (Details 2) (USD $)	3 Months Ended									0 Months Ended	3 Months Ended	0 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 CLO 2007-A, CLO 2005-1, CLO 2005-2 and CLO 2006-1 senior notes	Mar. 31, 2012 CLO 2007-A, CLO 2005-1 and CLO 2005-2 senior notes	Mar. 31, 2013 CLO 2011-1 senior debt	Mar. 31, 2012 CLO 2011-1 senior debt	Mar. 31, 2013 CLO 2007-1 Class D secured notes	Mar. 31, 2012 CLO 2007-1 Class D secured notes	Dec. 21, 2012 CLO 2012-1 senior secured notes	Dec. 21, 2012 CLO 2012-1 senior secured notes Nonaffiliates	Mar. 31, 2013 CLO 2012-1 senior secured notes Nonaffiliates	Dec. 21, 2012 CLO 2012-1 junior secured notes
Details of Company's borrowings
Collateralized loan obligation secured debt repaid	$ 167,633,000	$ 93,888,000	$ 146,200,000	$ 88,800,000	$ 21,500,000	$ 5,100,000
Maximum borrowing capacity									412,400,000
Par amount of notes issued								42,000,000		367,500,000		21,500,000
Floating rate senior secured note											342,500,000
Debt, variable interest rate basis											three-month LIBOR
Percentage of margin added to reference rate to determine interest rate on debt											2.09%
Fixed rate senior secured note											25,000,000
Fixed rate (as a percent)											2.39%
Proceeds from Issuance of Long-term Debt							$ 0	$ 31,900,000