CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Common stock dividend, per share, cash paid	$ 0.16	$ 0.14
Series A Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0.3672	$ 0.3672
Series B Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0.4297	$ 0.105
Series C Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0.3750	$ 0