CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED STATEMENTS OF EQUITY
Common stock dividends and dividends payable, per share (in dollars per share)	$ 0.51	$ 0.10
Series A preferred dividends and dividends payable, per share (in dollars per share)		$ 0.50	$ 2.00
Series C preferred dividends and dividends payable, per share (in dollars per share)		$ 0.786	$ 1.572
Series D preferred dividends and dividends payable, per share (in dollars per share)	$ 2.00	$ 2.00	$ 2.00