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2. Investment Securities (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Investment securities available for sale
Amortized Cost	$ 251,125	$ 259,505
Estimated Fair Value	262,423	268,530
Mortgage-backed securities
Investment securities available for sale
Amortized Cost	71,359	76,406
Gross Unrealized Gains	2,083	1,526
Gross Unrealized Losses	49	45
Estimated Fair Value	73,393	77,887
U.S. Government sponsored enterprises
Investment securities available for sale
Amortized Cost	38,575	38,173
Gross Unrealized Gains	743	399
Gross Unrealized Losses	240	155
Estimated Fair Value	39,078	38,417
State and political subdivisions
Investment securities available for sale
Amortized Cost	138,672	141,500
Gross Unrealized Gains	8,481	6,817
Gross Unrealized Losses	11	72
Estimated Fair Value	147,142	148,245
Corporate bonds
Investment securities available for sale
Amortized Cost	1,505	1,928
Gross Unrealized Gains	20	0
Gross Unrealized Losses	0	22
Estimated Fair Value	1,525	1,906
Trust preferred securities
Investment securities available for sale
Amortized Cost	750	750
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	750	750
Equity securities
Investment securities available for sale
Amortized Cost	264	748
Gross Unrealized Gains	271	577
Gross Unrealized Losses	0	0
Estimated Fair Value	535	1,325
Total
Investment securities available for sale
Amortized Cost	251,125	259,505
Gross Unrealized Gains	11,598	9,319
Gross Unrealized Losses	300	294
Estimated Fair Value	$ 262,423	$ 268,530

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
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+ References

Reference 1: 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)
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-Name Accounting Standards Codification
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