Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands		Dec. 15, 2016	Jun. 30, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost			$ 201,207	$ 165,462
Available-for-sale securities, Gross Unrealized Gains			905	319
Available-for-sale securities, Gross Unrealized Losses			525	1,879
Available-for-sale securities, Estimated Fair Value			201,587	163,902
Held-to-maturity securities, Amortized Cost			6,411	6,704
Held-to-maturity securities, Gross Unrealized Gains			252	102
Held-to-maturity securities, Estimated Fair Value			6,663	6,806
Equity [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost			659	652
Available-for-sale securities, Gross Unrealized Losses			1	12
Available-for-sale securities, Estimated Fair Value			658	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]		124
Available-for-sale securities, Estimated Fair Value	[1]		3,124	3,000
Floating interest rate		6.50%
U.S. Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost			49,173	34,320
Available-for-sale securities, Gross Unrealized Gains			83	56
Available-for-sale securities, Gross Unrealized Losses			40	58
Available-for-sale securities, Estimated Fair Value			49,216	34,318
Held-to-maturity securities, Amortized Cost			2,007	2,089
Held-to-maturity securities, Gross Unrealized Gains			57	26
Held-to-maturity securities, Estimated Fair Value			2,064	2,115
States and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held-to-maturity securities, Amortized Cost			1,404	1,615
Held-to-maturity securities, Gross Unrealized Gains			71	76
Held-to-maturity securities, Estimated Fair Value			1,475	1,691
Mortgage-backed [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost			151,375	130,490
Available-for-sale securities, Gross Unrealized Gains			822	263
Available-for-sale securities, Gross Unrealized Losses			484	1,809
Available-for-sale securities, Estimated Fair Value			$ 151,713	$ 128,944

[1] On December 15, 2016, the Company bought $3.0 million in subordinated notes with a fixed to floating rate of 6.5% from a local regional bank which it intends to hold to maturity of December 30, 2026.