Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available for sale, Amortized Cost, Due in one year or less	$ 13,025
Available for sale, Amortized Cost, Due after one year through five years	17,011
Available for sale, Amortized Cost, Due after five years through ten years	7,432
Available for sale, Amortized Cost, Due after ten years	134,195
Available for sale, Amortized Cost, Debt maturities	171,663
Available-for-sale securities, Amortized Cost	172,311	$ 212,284
Available for sale, Estimated Fair Value, Due in one year or less	13,053
Available for sale, Estimated Fair Value, Due after one year through five years	17,078
Available for sale, Estimated Fair Value, Due after five years through ten years	7,507
Available for sale, Estimated Fair Value, Due after ten years	136,487
Available for sale, Estimated Fair Value, Debt maturities	174,125
Available for sale, Estimated Fair Value, Total	174,788	212,165
Held to maturity securities, Amortized Cost, Due in one year or less	210
Held to maturity securities, Amortized Cost, Due after one year through five years	501
Held to maturity securities, Amortized Cost, Due after five years through ten years	402
Held to maturity securities, Amortized Cost, Due after ten years	2,696
Held to maturity securities, Amortized Cost, Debt maturities	3,809
Held to maturity securities, Amortized Cost, Total	3,809	4,191
Held to maturity securities, Estimated Fair Value, Due in one year or less	210
Held to maturity securities, Estimated Fair Value, Due after one year through five years	541
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	441
Held to maturity securities, Estimated Fair Value, Due after ten years	2,739
Held to maturity securities, Estimated Fair Value, Debt maturities	3,931
Held-to-maturity securities, Estimated Fair Value, Total	3,931	4,243
Equity [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, Amortized Cost	648	637
Available for sale, Estimated Fair Value, Total	$ 663	$ 641