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Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Schedule of Investments [Line Items]    
Amortized Cost: Due in one year or less $ 10,008  
Amortized Cost: Due after one year through five years 25,210  
Amortized Cost: Due after five years through ten years 6,276  
Amortized Cost: Due after ten years 49,183  
Amortized Cost: Sub Total 90,677  
Fair Value: Due in one year or less 10,030  
Fair Value: Due after one year through five years 25,463  
Fair Value: Due after five years through ten years 6,459  
Fair Value: Due after ten years 43,628  
Available For Sale Debt Maturities Fair Value Sub Total 85,580  
Available-for-sale Securities, Amortized Cost Basis 159,367 $ 173,549
Available-for-sale Securities 155,243 170,232
Amortized Cost: Due after five years through ten years, Held to maturity 15,637  
Amortized Cost: Due after ten years, Held to maturity 9,726  
Amortized Cost: Total, Held to maturity 25,363  
Fair Value: Due after five years through ten years, Held to maturity 16,674  
Fair Value: Due after ten years, Held to maturity 10,584  
Fair Value: Total, Held to maturity 27,258  
Held-to-maturity securities 101,521 105,560
Held-to-maturity securities, fair value 105,211 106,742
Residential mortgage-backed agencies [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 7,769 14,285
Available-for-sale Securities 7,709 14,170
Held-to-maturity securities 52,311 53,734
Held-to-maturity securities, fair value 53,204 53,912
Commercial mortgage-backed agencies [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 47,461 43,780
Available-for-sale Securities 48,418 43,636
Held-to-maturity securities 18,007 18,078
Held-to-maturity securities, fair value 18,888 18,232
Collateralized mortgage obligations [Member]    
Schedule of Investments [Line Items]    
Available-for-sale Securities, Amortized Cost Basis 13,460 9,690
Available-for-sale Securities 13,536 9,610
Held-to-maturity securities 5,840 6,419
Held-to-maturity securities, fair value $ 5,861 $ 6,297