Investment Securities - Available-for-sale (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	$ 175,153	$ 165,032
Unrealized Gain	784	1,146
Unrealized Loss	(3,183)	(3,810)
Fair Value	172,754	162,368
Total debt securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	161,454	157,389
Unrealized Gain	414	765
Unrealized Loss	(3,168)	(3,810)
Fair Value	158,700	154,344
U. S. Agency securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	48,874	29,234
Unrealized Gain	6	7
Unrealized Loss	(419)	(425)
Fair Value	48,461	28,816
U.S. Sponsored Mortgage-backed securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	59,364	56,080
Unrealized Gain	19	14
Unrealized Loss	(1,267)	(1,362)
Fair Value	58,116	54,732
Municipal securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	53,216	72,075
Unrealized Gain	389	744
Unrealized Loss	(1,482)	(2,023)
Fair Value	52,123	70,796
Equity and other securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	13,699	7,643
Unrealized Gain	370	381
Unrealized Loss	(15)	0
Fair Value	$ 14,054	$ 8,024

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
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Paragraph 2
-Subparagraph (c)
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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
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