CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Common stock dividend, per share, cash paid	$ 0.28	$ 0.24
Series A Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0.7344	$ 0.6650
Series C Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0.0458	$ 0
Series B Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0.5347	$ 0
Retired Series C Preferred Stock [Member]
Preferred stock (in usd per share)	$ 0	$ 2.36