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Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Schedule of Investments [Line Items]    
Amortized Cost: Due after one year through five years $ 10,671  
Amortized Cost: Due after five years through ten years 19,939  
Amortized Cost: Due after ten years 43,514  
Amortized Cost: Sub Total 74,124  
Fair Value: Due after one year through five years 10,681  
Fair Value: Due after five years through ten years 20,102  
Fair Value: Due after ten years 39,236  
Available For Sale Debt Maturities Fair Value Sub Total 70,019  
Available-for-sale Securities, Amortized Cost Basis 151,329 $ 173,549
Available-for-sale Securities 148,037 170,232
Amortized Cost: Due after five years through ten years, Held to maturity 15,704  
Amortized Cost: Due after ten years, Held to maturity 6,987  
Amortized Cost: Total, Held to maturity 22,691  
Fair Value: Due after five years through ten years, Held to maturity 16,839  
Fair Value: Due after ten years, Held to maturity 8,442  
Fair Value: Total, Held to maturity 25,281  
Held-to-maturity securities 98,387 105,560
Held-to-maturity securities, fair value 103,286 106,742
Residential mortgage-backed agencies [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis   14,285
Available-for-sale Securities   14,170
Held-to-maturity securities 52,784 53,734
Held-to-maturity securities, fair value 53,995 53,912
Commercial mortgage-backed agencies [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 56,191 43,780
Available-for-sale Securities 57,010 43,636
Held-to-maturity securities 17,657 18,078
Held-to-maturity securities, fair value 18,730 18,232
Collateralized mortgage obligations [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 21,014 9,690
Available-for-sale Securities 21,008 9,610
Held-to-maturity securities 5,255 6,419
Held-to-maturity securities, fair value $ 5,280 $ 6,297