CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Common stock dividend, per share, cash paid	$ 0.12	$ 0.10
Series C Preferred Stock
Preferred stock, per share	$ 2.36	$ 12.50
Series A Preferred Stock [Member]
Preferred stock, per share	$ 0.2978	$ 0