Investments (Amortized Cost and Fair Values Classified by Contractual Maturity Date) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Investments [Line Items]
Amortized Cost: Due after one year through five years	$ 10,662
Amortized Cost: Due after five years through ten years	18,687
Amortized Cost: Due after ten years	45,864
Amortized Cost: Sub Total	75,213
Fair Value: Due after one year through five years	10,541
Fair Value: Due after five years through ten years	18,174
Fair Value: Due after ten years	38,517
Available For Sale Debt Maturities Fair Value Sub Total	67,232
Available-for-sale Securities, Amortized Cost Basis	146,204	$ 149,561
Available-for-sale Securities	136,937	140,000
Amortized Cost: Due after five years through ten years, Held to maturity	15,772
Amortized Cost: Due after ten years, Held to maturity	8,630
Amortized Cost: Total, Held to maturity	24,402
Fair Value: Due after five years through ten years, Held to maturity	16,290
Fair Value: Due after ten years, Held to maturity	9,062
Fair Value: Total, Held to maturity	25,352
Held-to-maturity securities	98,019	97,169
Held-to-maturity securities, fair value	98,916	97,981
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Held-to-maturity securities	51,515	50,384
Held-to-maturity securities, fair value	51,312	50,265
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	51,321	52,978
Available-for-sale Securities	50,394	52,222
Held-to-maturity securities	17,509	17,584
Held-to-maturity securities, fair value	17,761	17,832
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Amortized Cost Basis	19,670	19,953
Available-for-sale Securities	19,311	19,567
Held-to-maturity securities	4,593	4,833
Held-to-maturity securities, fair value	$ 4,491	$ 4,684