Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Cumulative Series C Six Point Seven Five Percent Redeemable Perpetual Preferred Stock [Member]	Dec. 31, 2012 Cumulative Series C Six Point Seven Five Percent Redeemable Perpetual Preferred Stock [Member]	Dec. 31, 2013 Cumulative Series D Six Percent Non-Qualified Preferred Stock [Member]	Dec. 31, 2012 Cumulative Series D Six Percent Non-Qualified Preferred Stock [Member]	Dec. 31, 2013 Cumulative Series E Eighteen Point Seventy Five Percent Non-Voting Preferred Stock [Member]	Dec. 31, 2012 Cumulative Series E Eighteen Point Seventy Five Percent Non-Voting Preferred Stock [Member]
Preferred stock, par value	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.00	$ 0.01	$ 0.00
Preferred Stock, Shares Authorized	9,945,164	9,945,539	54,461	54,461	125	0	250	0
Preferred stock, shares issued	0	0	54,458	54,458	125	0	250	0
Preferred stock, shares outstanding	0	0	54,458	54,458	125	0	250	0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	100,000,000
Common stock, shares issued	83,313,677	83,193,310
Common stock, shares outstanding	83,313,677	83,193,310