VARIABLE INTEREST ENTITIES RSO Cash Flow Detail (Parenthetical) (Details) (RSO [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from dividend reinvestment and stock purchase plan, offering costs	$ 0	$ 19	$ 11
Common Stock [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Offering costs on stock issuance	3,837	2,165	1,263
Redeemable Preferred Stock Series A [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Offering costs on stock issuance	3	781	0
Preferred stock, coupon authorized (in hundredths)	8.50%
Redeemable Preferred Stock Series B [Member]
CASH FLOWS FROM FINANCING ACTIVITIES:
Offering costs on stock issuance	$ 1,670	$ 1,201	$ 0
Preferred stock, coupon authorized (in hundredths)	8.25%