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Fair Value (Financial instruments Measured at Fair Value) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Securities available for sale:      
Total available for sale securities $ 214,743 $ 199,329 $ 247,140
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale:      
Total available for sale securities 214,743 199,329  
Recurring [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]      
Securities available for sale:      
Government-sponsored enterprise securities  
Mortgage-backed securities  
Corporate bonds  
Equity securities    
Total available for sale securities  
Recurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Securities available for sale:      
Government-sponsored enterprise securities 19,426 17,490  
Mortgage-backed securities 160,786 148,065  
Corporate bonds 34,531 33,600  
Equity securities   174  
Total available for sale securities 214,743 199,329  
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Securities available for sale:      
Government-sponsored enterprise securities  
Mortgage-backed securities  
Corporate bonds  
Equity securities    
Total available for sale securities  
Recurring [Member] | Fair Value [Member]      
Securities available for sale:      
Government-sponsored enterprise securities 19,426 17,490  
Mortgage-backed securities 160,786 148,065  
Corporate bonds 34,531 33,600  
Equity securities   174  
Total available for sale securities 214,743 199,329  
Nonrecurring [Member] | Quoted Prices in Market for Identical Assets (Level 1) [Member]      
Impaired loans and foreclosed real estate:      
Impaired loans  
Foreclosed real estate  
Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]      
Impaired loans and foreclosed real estate:      
Impaired loans  
Foreclosed real estate  
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]      
Impaired loans and foreclosed real estate:      
Impaired loans 15,797 12,284  
Foreclosed real estate 12,789 9,532  
Nonrecurring [Member] | Fair Value [Member]      
Impaired loans and foreclosed real estate:      
Impaired loans 15,797 12,284  
Foreclosed real estate $ 12,789 $ 9,532