Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Series A Preferred Stock	Dec. 31, 2012 Series A Preferred Stock	Dec. 31, 2013 Series B Preferred Stock	Dec. 31, 2012 Series B Preferred Stock
Preferred stock, par value (in dollars per share)			$ 0.01	$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares authorized			10,000,000	10,000,000	10,000,000	10,000,000
Preferred stock, liquidation preference (in dollars per share)			$ 25.00	$ 25.00	$ 25.00	$ 25.00
Preferred stock, shares issued			2,760,000	2,760,000	2,800,000
Preferred stock, shares outstanding			2,760,000	2,760,000	2,800,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	44,764,377	35,698,582
Common stock, shares outstanding	44,764,377	35,698,582