Equity - Convertible Preferred Stock Table (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2013 5.75% Cumulative Convertible Preferred Stock	Mar. 31, 2013 5.75% Cumulative Convertible Preferred Stock	Dec. 31, 2013 5.75% Cumulative Convertible Preferred Stock Series A	Mar. 31, 2013 5.75% Cumulative Convertible Preferred Stock Series A	Dec. 31, 2013 4.50% Cumulative Convertible Preferred Stock [Member]	Mar. 31, 2013 4.50% Cumulative Convertible Preferred Stock [Member]	Dec. 31, 2013 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Mar. 31, 2013 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Mar. 31, 2014 Preferred Stock 5.75% Cumulative Convertible Preferred Stock	Mar. 31, 2013 Preferred Stock 5.75% Cumulative Convertible Preferred Stock	Dec. 31, 2012 Preferred Stock 5.75% Cumulative Convertible Preferred Stock	Mar. 31, 2014 Preferred Stock 5.75% Cumulative Convertible Preferred Stock Series A	Mar. 31, 2013 Preferred Stock 5.75% Cumulative Convertible Preferred Stock Series A	Dec. 31, 2012 Preferred Stock 5.75% Cumulative Convertible Preferred Stock Series A	Mar. 31, 2014 Preferred Stock 4.50% Cumulative Convertible Preferred Stock [Member]	Mar. 31, 2013 Preferred Stock 4.50% Cumulative Convertible Preferred Stock [Member]	Dec. 31, 2012 Preferred Stock 4.50% Cumulative Convertible Preferred Stock [Member]	Mar. 31, 2014 Preferred Stock 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Mar. 31, 2013 Preferred Stock 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Dec. 31, 2012 Preferred Stock 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Liquidation Preference Per Share											$ 1,000,000	$ 1,000,000		$ 1,000,000	$ 1,000,000		$ 100,000	$ 100,000		$ 100,000	$ 100,000
Shares outstanding, beginning of period	7,251,515	7,251,515	1,497,000	1,497,000	1,100,000	1,100,000	2,559,000	2,559,000	2,096,000	2,096,000	1,497,000		1,497,000	1,100,000		1,100,000	2,559,000		2,559,000	2,096,000		2,096,000
Shares outstanding, end of period	7,251,515	7,251,515	1,497,000	1,497,000	1,100,000	1,100,000	2,559,000	2,559,000	2,096,000	2,096,000	1,497,000		1,497,000	1,100,000		1,100,000	2,559,000		2,559,000	2,096,000		2,096,000