Preferred and Common Stock (Details) - USD ($)
2 Months Ended 6 Months Ended 11 Months Ended
Feb. 29, 2016
Jun. 30, 2016
Jun. 30, 2015
Dec. 11, 2015
Dec. 31, 2015
Preferred stock shares outstanding   73,935     73,935
Common stock shares outstanding   109,538,620     110,468,753
Undeclared preferred dividends   $ 7,340,000      
Acquisition of treasury stock, value (Note 9)   $ (819,000)      
Restricted common stock          
Number of common stock issued to employees       2,540,000  
Forfeited shares of common stock   2,850 2,223    
Restricted stock units          
Vested stock units   21,301 15,000    
Stock options          
Number of common stock issued to employees       1,000,000  
American Depositary Shares - The Series G          
Preferred stock shares outstanding   20,000     20,000
Sale of Stock- Redemption price per share   $ 25      
Depositary Shares   2,000,000      
Dividend rate of preferred stock   8.75%      
Preferred stock liquidation preference   $ 2,500      
American Depositary Shares - The Series H          
Preferred stock shares outstanding   48,000     48,000
Sale of Stock- Redemption price per share   $ 25      
Depositary Shares   4,800,000      
Dividend rate of preferred stock   8.625%      
Preferred stock liquidation preference   $ 2,500      
Convertible preferred stock          
Conversion of Stock, Shares converted     840    
Preferred stock shares outstanding   5,935     5,935
Sale of Stock- Redemption price per share   $ 10      
Preferred stock liquidation preference   $ 10,000      
Common Stock          
Converted Shares of Common Stock     840,000    
Acquisition of treasury stock, shares (Note 9)   (948,584)      
Share Repurchase Program | Common Stock          
Share repurchase program, Authorized amount   $ 25,000,000      
Acquisition of treasury stock, shares (Note 9) 1,147,908        
Acquisition of treasury stock, value (Note 9) $ 1,071,000