SECURITIES (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Concentrated risks
Number of issuers with whom a specified percentage of estimated fair value of corporate debt securities is concentrated (in issuers)	10	10
Number of largest issuers out of ten issuers with whom a specified percentage of estimated fair value of debt securities is concentrated (in issuers)	3	3
Securities	$ 350,341	$ 412,293
Estimated fair value of securities pledged as collateral
Pledged as collateral for collateralized loan obligation secured debt and junior secured notes to affiliates	324,830	354,088
Total	324,830	354,088
Corporate debt securities | Credit concentration | Top three largest
Concentrated risks
Investment in affiliates as a percentage of total investment (in percentage)	21.00%	19.00%
Securities	$ 104,500	$ 87,000
Corporate debt securities | Credit concentration | Ten issuers
Concentrated risks
Investment in affiliates as a percentage of total investment (in percentage)	55.00%	51.00%