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Investment Securities (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Investments [Line Items]
Gross investment gains	$ 56,000	$ 60,000	$ 115,000	$ 183,000
Gross investment losses				6,000
Investment Securities:
Proceeds from sales of investment securities — available for sale	937,000	$ 1,500,000	8,143,000	$ 8,966,000
Book value of securities available for sale and held to maturity	$ 114,589,000		$ 114,589,000		$ 104,953,000
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	104		104
Standard & Poor's, AAA Rating [Member]
Investments [Line Items]
Portfolio rated	57.80%		57.80%		63.50%
Standard & Poor's, A Rating [Member]
Investments [Line Items]
Portfolio rated	12.80%		12.80%		10.10%
Maximum [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years			60 months
Maximum [Member] | Standard & Poor's, A Rating [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years			44 months 6 days
Minimum [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years			24 months
Minimum [Member] | Standard & Poor's, A Rating [Member]
Investment Securities:
Consolidated investment securities portfolio modified, years			41 months 6 days

X

- Definition

Carrying value of available for sale held to maturity and federal home loan bank.

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The gain realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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Investment securities.

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The loss realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26853-111562

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Section 45
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