VARIABLE INTEREST ENTITIES RSO Cash Flow Detail (Parenthetical) (Details) (RSO [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from dividend reinvestment and stock purchase plan, offering costs	$ 0	$ 0
Common Stock [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Offering costs on stock issuance	0	0
Redeemable Preferred Stock Series A [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Offering costs on stock issuance	0	0
Preferred stock, coupon authorized	8.50%
Redeemable Preferred Stock Series B [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Offering costs on stock issuance	$ 111	$ 565
Preferred stock, coupon authorized	8.25%