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6. Fair Value, Level of Hierarchy (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Estimated Fair Value	$ 264,092	$ 268,530
Level 1
Estimated Fair Value	1,270	1,325
Level 2
Estimated Fair Value	262,072	266,455
Level 3
Estimated Fair Value	750	750
Mortgage-backed securities
Estimated Fair Value	73,879	77,887
Mortgage-backed securities | Level 1
Estimated Fair Value	0	0
Mortgage-backed securities | Level 2
Estimated Fair Value	73,879	77,887
Mortgage-backed securities | Level 3
Estimated Fair Value	0	0
U.S. Government sponsored enterprises
Estimated Fair Value	37,517	38,417
U.S. Government sponsored enterprises | Level 1
Estimated Fair Value	0	0
U.S. Government sponsored enterprises | Level 2
Estimated Fair Value	37,517	38,417
U.S. Government sponsored enterprises | Level 3
Estimated Fair Value	0	0
State and political subdivisions
Estimated Fair Value	148,765	148,245
State and political subdivisions | Level 1
Estimated Fair Value	0	0
State and political subdivisions | Level 2
Estimated Fair Value	148,765	148,245
State and political subdivisions | Level 3
Estimated Fair Value	0	0
Corporate bonds
Estimated Fair Value	1,911	1,906
Corporate bonds | Level 1
Estimated Fair Value	0	0
Corporate bonds | Level 2
Estimated Fair Value	1,911	1,906
Corporate bonds | Level 3
Estimated Fair Value	0	0
Trust preferred securities
Estimated Fair Value	750	750
Trust preferred securities | Level 1
Estimated Fair Value	0	0
Trust preferred securities | Level 2
Estimated Fair Value	0	0
Trust preferred securities | Level 3
Estimated Fair Value	750	750
Equity securities
Estimated Fair Value	1,270	1,325
Equity securities | Level 1
Estimated Fair Value	1,270	1,325
Equity securities | Level 2
Estimated Fair Value	0	0
Equity securities | Level 3
Estimated Fair Value	$ 0	$ 0

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=51813488&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=49167202&loc=d3e26610-111562

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