Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands		Mar. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost		$ 178,415	$ 165,462
Available-for-sale securities, Gross Unrealized Gains		519	319
Available-for-sale securities, Gross Unrealized Losses		862	1,879
Available-for-sale securities, Estimated Fair Value		178,072	163,902
Held-to-maturity securities, Amortized Cost		6,615	6,704
Held-to-maturity securities, Gross Unrealized Gains		240	102
Held-to-maturity securities, Estimated Fair Value		6,855	6,806
Equity [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost		655	652
Available-for-sale securities, Gross Unrealized Losses		7	12
Available-for-sale securities, Estimated Fair Value		648	640
Held-to-maturity securities, Amortized Cost		3,000
Other Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost	[1]	3,000	3,000
Available-for-sale securities, Gross Unrealized Gains	[1]	139
Available-for-sale securities, Estimated Fair Value	[1]	3,139	3,000
U.S. Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost		43,311	34,320
Available-for-sale securities, Gross Unrealized Gains		38	56
Available-for-sale securities, Gross Unrealized Losses		74	58
Available-for-sale securities, Estimated Fair Value		43,275	34,318
Held-to-maturity securities, Amortized Cost		2,001	2,089
Held-to-maturity securities, Gross Unrealized Gains		29	26
Held-to-maturity securities, Estimated Fair Value		2,030	2,115
States and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held-to-maturity securities, Amortized Cost		1,614	1,615
Held-to-maturity securities, Gross Unrealized Gains		72	76
Held-to-maturity securities, Estimated Fair Value		1,686	1,691
Mortgage-backed [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost		134,449	130,490
Available-for-sale securities, Gross Unrealized Gains		481	263
Available-for-sale securities, Gross Unrealized Losses		781	1,809
Available-for-sale securities, Estimated Fair Value		$ 134,149	$ 128,944

[1] On December 15, 2016, the Company bought $3.0 million in subordinated notes from a local regional bank which it intends to hold to maturity of December 30, 2026.