FAIR VALUE ACCOUNTING AND MEASUREMENT (Asset Inputs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 financial_institution	Dec. 31, 2012
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Amortized Cost	$ 80,193	90,339
TRUP CDO Securities [Member] | Discounted cash flows [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Amortized Cost	31,000
Asset gains	(990)
TPS Securities [Member] | Discounted cash flows [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Amortized Cost	19,000
Number of Individual Financial Institutions Issuing Securities With No Direct Market Data or Independent Valuation Source Available	3
Discount Rate, Description of Variable Rate Basis		three-month LIBOR
Discount Rate, Basis Spread on Variable Rate Basis	5.25%	525.00%
Asset gains	$ 0