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Investment Securities (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2011
Investment [Line Items]        
Fair value of investments reported at less than historical cost $ 24,872,000   $ 97,566,000  
Percentage of Bank portfolio 9.30%   37.40%  
Proceeds from sales of securities - available for sale $ 3,883,000 $ 7,539,000    
Gross realized gain on sale of securities 118,000 240,000    
Gross realized losses on sale of securities $ 0 $ 0    
Percentage of recovery estimate depository institutions 10.00%      
Percentage of recovery estimate insurance companies 15.00%      
Pooled Trust Preferred Securities [Member]        
Investment [Line Items]        
Current par balance $ 3,800,000      
Original Par $ 4,000,000     $ 4,000,000