Income Taxes (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Series A Preferred Stock [Member]
Income Taxes [Line Items]
Dividend income (in dollars per share)	$ 0		$ 0		$ 0
Dividend income, percent	0.00%		0.00%		0.00%
Return of capital (in dollars per share)	$ 1.95	[1]	$ 5.3625	[2]	$ 1.95	[3]
Return of capital, percent	100.00%		100.00%		100.00%
Dividends paid (in dollars per share)	$ 1.95000		$ 5.3625000		$ 1.95000
Dividends paid, percent	100.00%		100.00%		100.00%
Series C Preferred Stock [Member]
Income Taxes [Line Items]
Dividend income (in dollars per share)	$ 0		$ 0		$ 0
Dividend income, percent	0.00%		0.00%		0.00%
Return of capital (in dollars per share)	$ 2.00	[1]	$ 5.50	[2]	$ 2.00	[3]
Return of capital, percent	100.00%		100.00%		100.00%
Dividends paid (in dollars per share)	$ 2.000		$ 5.5000		$ 2.000
Dividends paid, percent	100.00%		100.00%		100.00%

[1] (c)Fourth quarter 2012 preferred distributions were paid January 31, 2013, and were treated as 2013 distributions for tax purposes.

[2] (b)Fourth quarter 2011 preferred distributions were paid January 31, 2012, and were treated as 2012 distributions for tax purposes.

[3] (a)Fourth quarter 2010 preferred distributions were paid January 31, 2011, and were treated as 2011 distributions for tax purposes.