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Shareholders' Equity (Narrative) (Details) - $ / shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Shareholders Equity [Line Items]    
Capital shares authorized 50,210,000  
Common stock, shares authorized 50,000,000 50,000,000
Common stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 210,000  
Preferred stock, par value $ 100  
Preferred stock, shares issued 173,398 173,398
Preferred stock, shares outstanding 173,398 173,398
Preferred Class A [Member]    
Shareholders Equity [Line Items]    
Preferred stock, shares authorized 10,000  
Series A 3% Preferred Stock [Member]    
Shareholders Equity [Line Items]    
Preferred stock, dividend percentage 3.00% 3.00%
Preferred stock, shares issued 1,492 1,492
Preferred stock, dividend per share $ 3.00  
Preferred Class B [Member]    
Shareholders Equity [Line Items]    
Preferred stock, shares authorized 200,000  
Series B-1 8.48% Preferred Stock [Member]    
Shareholders Equity [Line Items]    
Preferred stock, shares authorized 200,000 200,000
Preferred stock, par value $ 100 $ 100
Preferred stock, dividend percentage 8.48% 8.48%
Preferred stock, shares issued 171,906 171,906
Preferred stock, dividend per share $ 8.48