FAIR VALUE MEASUREMENTS (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended				1 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012	Jul. 03, 2013 Performing Bond Portfolio [Member]	Jun. 30, 2013 Performing Bond Portfolio [Member]	Dec. 31, 2012 Performing Bond Portfolio [Member]	Jun. 30, 2013 Non Performing Bond Portfolio [Member]	Dec. 31, 2012 Non Performing Bond Portfolio [Member]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	$ (22,362)		$ 8,708	$ (11,533)		$ 15,685
Other Comprehensive Income (Loss), Reclassification Adjustment for Write-down of Securities Included in Net Income, Net of Tax	480		849	833		1,087
Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, Net of Tax	$ 416	[1]	$ 52	$ 598	[1]	$ 52
Weighted Average Discount Rate, Percent								6.34%	6.34%	6.29%	8.30%	8.30%
Capitalized Interest Rate	7.00%			7.00%			7.00%
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage				33.30%

[1] Realized gains on bond redemptions included in “Net gains (losses) on assets and derivatives” on the consolidated statements of operations. There is no applicable income tax on the realized gains.