DERIVATIVE INSTRUMENTS (Details 4) (Free-Standing Derivatives:, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Effect on income from free-standing derivatives
Realized gains (losses)	$ 2,031	$ (2,337)	$ 3,486
Unrealized gains (losses)	(8,869)	246	(7,298)
Total	(6,838)	(2,091)	(3,812)
Commodity swaps
Effect on income from free-standing derivatives
Realized gains (losses)	1,296	3,554	352
Unrealized gains (losses)	(5,562)	721	7,596
Total	(4,266)	4,275	7,948
Credit Default Swaps
Effect on income from free-standing derivatives
Realized gains (losses)	(4,408)	(6,079)	1,033
Unrealized gains (losses)	188	942	(7,063)
Total	(4,220)	(5,137)	(6,030)
Foreign exchange forward contracts and options
Effect on income from free-standing derivatives
Realized gains (losses)	1,104	(503)	11
Unrealized gains (losses)	(2,096)	(2,544)	(4,806)
Total	(992)	(3,047)	(4,795)
Common stock warrants
Effect on income from free-standing derivatives
Realized gains (losses)	2,327	691	2,184
Unrealized gains (losses)	(1,503)	986	(3,074)
Total	824	1,677	(890)
Total Rate of Return Swaps
Effect on income from free-standing derivatives
Realized gains (losses)	1,803
Unrealized gains (losses)	(229)	141	49
Total	1,574	141	49
Options
Effect on income from free-standing derivatives
Realized gains (losses)	(91)		(94)
Unrealized gains (losses)	333
Total	$ 242		$ (94)