Investment Securities (Amortized Cost and Estimated Fair Values of Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost	$ 172,311	$ 212,284
Available-for-sale securities, Gross Unrealized Gains	2,691	733
Available-for-sale securities, Gross Unrealized Losses	214	852
Available-for-sale securities, Estimated Fair Value	174,788	212,165
Held-to-maturity securities, Amortized Cost	3,809	4,191
Held-to-maturity securities, Gross Unrealized Gains	122	112
Held-to-maturity securities, Gross Unrealized Losses		60
Held-to-maturity securities, Estimated Fair Value	3,931	4,243
Equity [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost	648	637
Available-for-sale securities, Gross Unrealized Gains	15	4
Available-for-sale securities, Estimated Fair Value	663	641
U.S. Treasury [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost		5,078
Available-for-sale securities, Gross Unrealized Gains		1
Available-for-sale securities, Estimated Fair Value		5,079
U.S. Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost	32,423	49,630
Available-for-sale securities, Gross Unrealized Gains	118	89
Available-for-sale securities, Gross Unrealized Losses	111	190
Available-for-sale securities, Estimated Fair Value	32,430	49,529
Held-to-maturity securities, Amortized Cost	2,194	2,575
Held-to-maturity securities, Gross Unrealized Gains	10
Held-to-maturity securities, Gross Unrealized Losses		60
Held-to-maturity securities, Estimated Fair Value	2,204	2,515
States and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Held-to-maturity securities, Amortized Cost	1,615	1,616
Held-to-maturity securities, Gross Unrealized Gains	112	112
Held-to-maturity securities, Estimated Fair Value	1,727	1,728
Mortgage-backed [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Available-for-sale securities, Amortized Cost	139,240	156,939
Available-for-sale securities, Gross Unrealized Gains	2,558	639
Available-for-sale securities, Gross Unrealized Losses	103	662
Available-for-sale securities, Estimated Fair Value	$ 141,695	$ 156,916

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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