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	Mar. 31, 2015	Dec. 31, 2014
RSO [Member]
Fair Value
Less than one year	$ 84,119	$ 78,095
Greater than one year and less than five years	125,176	115,302
Greater than five years and less than ten years	16,808	20,177
Greater than ten years	57,967	62,146
Total	284,070	275,720
Amortized Cost
Less than one year	82,983	79,649
Greater than one year and less than five years	113,882	100,909
Greater than five years and less than ten years	14,358	17,516
Greater than ten years	54,099	58,441
Total	$ 265,322	$ 256,515
Weighted Average Coupon
Less than one year	4.97%	4.13%
Greater than one year and less than five years	8.34%	4.64%
Greater than five years	10.86%	16.45%
Weighted average coupon rate, greater than ten years	6.50%	7.86%
Total	7.12%	6.08%