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2. Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Investment securities available for sale
Estimated Fair Value	$ 301,788	$ 297,823
Mortgage-backed securities
Investment securities available for sale
Amortized Cost	127,153	146,755
Gross Unrealized Gains	1,017	1,875
Gross Unrealized Losses	697	606
Estimated Fair Value	127,473	148,024
U.S. Government sponsored enterprises
Investment securities available for sale
Amortized Cost	22,557	18,714
Gross Unrealized Gains	186	203
Gross Unrealized Losses	9	80
Estimated Fair Value	22,734	18,837
State and political subdivisions
Investment securities available for sale
Amortized Cost	147,847	118,591
Gross Unrealized Gains	2,313	7,171
Gross Unrealized Losses	5,032	104
Estimated Fair Value	145,128	125,658
Corporate bonds
Investment securities available for sale
Amortized Cost	3,535	2,571
Gross Unrealized Gains	15	19
Gross Unrealized Losses	63	4
Estimated Fair Value	3,487	2,586
Trust preferred securities
Investment securities available for sale
Amortized Cost	1,250	1,250
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	1,250	1,250
Equity securities
Investment securities available for sale
Amortized Cost	748	748
Gross Unrealized Gains	968	720
Gross Unrealized Losses	0	0
Estimated Fair Value	1,716	1,468
Total
Investment securities available for sale
Amortized Cost	303,090	288,629
Gross Unrealized Gains	4,499	9,988
Gross Unrealized Losses	5,801	794
Estimated Fair Value	$ 301,788	$ 297,823

X

- Definition

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)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

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- Definition

This item represents the cost of debt and equity 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.

+ 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)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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- Definition

Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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