FAIR VALUE ACCOUNTING AND MEASUREMENT (Asset Inputs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Securities—trading, Fair Value	$ 37,515	$ 40,258
Securities—trading, Amortized Cost	42,716	$ 47,480
Available-for-sale Debt Securities, Amortized Cost Basis	$ 416,731
TPS Securities [Member] | Income approach, using discounted cash-flow model [Member] | Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount Rate, Description of Variable Rate Basis	three-month LIBOR	three-month LIBOR
Discount Rate, Basis Spread on Variable Rate Basis	5.00%	5.25%
Carrying Value
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Securities—trading, Fair Value	$ 37,515	$ 40,258