VARIABLE INTEREST ENTITIES - INVESTMENT SECURITIES AVAILABLE-FOR-SALE (Estimated Maturities of Available-For-Sale Securities) (Details) RSO (RSO [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
RSO [Member]
Fair Value
Less than one year	$ 78,095	$ 39,256
Greater than one year and less than five years	115,302	139,700
Greater than five years and less than ten years	20,177	26,526
Greater than ten years	62,146	9,724
Total	275,720	215,206
Amortized Cost
Less than one year	79,649	40,931
Greater than one year and less than five years	100,909	141,760
Greater than five years and less than ten years	17,516	25,707
Greater than ten years	58,441	10,072
Total	$ 256,515	$ 218,470
Weighted Average Coupon
Less than one year	4.13%	5.25%
Greater than one year and less than five years	4.64%	4.69%
Greater than five years	16.45%	1.10%
Weighted average coupon rate, greater than ten years	7.86%	7.90%
Total	6.08%	4.49%