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Shareholders' Equity Transactions (Narrative) (Details) - USD ($)
 1 Months Ended 12 Months Ended 24 Months Ended 28 Months Ended
Oct. 16, 2015
Jun. 25, 2015
Jan. 31, 2013
Sep. 30, 2011
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2015
Dec. 31, 2013
Preferred stock redeemed         $ (63,500,000)          
Small Business Lending Fund [Member]                    
Stock issued               $ 63,500,000    
Stock issued, shares               63,500    
Liquidation value of shares               $ 1,000    
Threshold for qualified community banks               $ 10,000,000,000    
Accrued dividends         370,000 $ 635,000     $ 370,000 $ 662,000
Series C Preferred Stock [Member]                    
Stock issued, shares             728,706      
Stock sold price per share             $ 10.00      
Accrued dividends         $ 233,000 $ 233,000     $ 233,000 $ 233,000
Series B Preferred Stock [Member] | Small Business Lending Fund [Member]                    
Liquidation value of shares $ 1,000 $ 1,000                
Preferred stock redeemed $ 31,500,000 $ 32,000,000                
Preferred stock redeemed, shares 31,500 32,000                
Preferred stock dividend rate     1.00%   1.00%     5.00%    
Preferred stock dividend rate after five years       9.00%            
Series B Preferred Stock [Member] | Small Business Lending Fund [Member] | Minimum [Member]                    
Preferred stock dividend rate                 1.00% 1.00%
Series B Preferred Stock [Member] | Small Business Lending Fund [Member] | Maximum [Member]                    
Preferred stock dividend rate                 7.00% 5.00%
Common Stock [Member]                    
Stock issued, shares             2,656,294      
Common stock issued under stock option plans, shares         7,000 5,000