Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	$ 221,055	$ 229,706
Gross Unrealized Gains	53	158
Gross Unrealized Losses	(5,388)	(3,322)
Fair value	215,720	226,542
U.S. Treasury
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	1,981	1,980
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(42)	(13)
Fair value	1,939	1,967
U.S. government and federal agency obligations
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	11,798	12,341
Gross Unrealized Losses	(305)	(268)
Fair value	11,493	12,073
Government sponsored enterprises
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	38,819	37,321
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(642)	(424)
Fair value	38,177	36,897
Obligations of states and political subdivisions
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	42,271	47,019
Gross Unrealized Gains	42	114
Gross Unrealized Losses	(709)	(477)
Fair value	41,604	46,656
Mortgage-backed securities \| Residential - government agencies
Amortized cost and fair value of debt securities available-for-sale
Total Amortized Cost	126,186	131,045
Gross Unrealized Gains	11	44
Gross Unrealized Losses	(3,690)	(2,140)
Fair value	$ 122,507	$ 128,949

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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