Equity - Convertible Preferred Stock Table (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2013 5.75% Cumulative Convertible Preferred Stock [Member]	Jun. 30, 2013 5.75% Cumulative Convertible Preferred Stock [Member]	Dec. 31, 2012 5.75% Cumulative Convertible Preferred Stock [Member]	Dec. 31, 2013 5.75% Cumulative Convertible Preferred Stock Series A [Member]	Jun. 30, 2013 5.75% Cumulative Convertible Preferred Stock Series A [Member]	Dec. 31, 2012 5.75% Cumulative Convertible Preferred Stock Series A [Member]	Dec. 31, 2013 4.50% Cumulative Convertible Preferred Stock [Member]	Jun. 30, 2013 4.50% Cumulative Convertible Preferred Stock [Member]	Dec. 31, 2012 4.50% Cumulative Convertible Preferred Stock [Member]	Dec. 31, 2013 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Jun. 30, 2013 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Dec. 31, 2012 5.0% Cumulative Convertible Preferred Stock Series Two Thousand And Five B [Member]	Jun. 30, 2014 Convertible Preferred Stock [Member] 5.75% Cumulative Convertible Preferred Stock [Member]	Jun. 30, 2014 Convertible Preferred Stock [Member] 5.75% Cumulative Convertible Preferred Stock Series A [Member]	Jun. 30, 2014 Convertible Preferred Stock [Member] 4.50% Cumulative Convertible Preferred Stock [Member]	Jun. 30, 2014 Convertible Preferred Stock [Member] 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			$ 100,000			$ 100,000		$ 1,000,000	$ 1,000,000	$ 100,000	$ 100,000
Shares outstanding, beginning of period	7,251,515	7,251,515	1,497,000	1,497,000	1,497,000	1,100,000	1,100,000	1,100,000	2,559,000	2,559,000	2,559,000	2,096,000	2,096,000	2,096,000	1,497,000	1,100,000	2,559,000	2,096,000
Shares outstanding, end of period	7,251,515	7,251,515	1,497,000	1,497,000	1,497,000	1,100,000	1,100,000	1,100,000	2,559,000	2,559,000	2,559,000	2,096,000	2,096,000	2,096,000	1,497,000	1,100,000	2,559,000	2,096,000
Share Price															$ 25.2617	$ 26.1412	$ 40.9011	$ 36.2077

The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share.

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