Allowance for Loan Losses (Details 6) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	$ 865,321	$ 879,558
Past Due	9,552	10,075
Total loans	874,873	889,633
90 Days Past Due and Still Accruing	0	0
30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	7,817	7,687
60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	694	1,250
90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	1,041	1,138
Commercial [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	158,522	159,181
Past Due	254	11
Total loans	158,776	159,192
90 Days Past Due and Still Accruing	0	0
Commercial [Member] \| 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	243	0
Commercial [Member] \| 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	0	0
Commercial [Member] \| 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	11	11
Commercial loans secured by real estate [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	446,505	457,722
Past Due	5,282	6,058
Total loans	451,787	463,780
90 Days Past Due and Still Accruing	0	0
Commercial loans secured by real estate [Member] \| 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	5,282	5,238
Commercial loans secured by real estate [Member] \| 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	0	534
Commercial loans secured by real estate [Member] \| 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	0	286
Real estate-mortgage [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	240,783	243,393
Past Due	3,539	3,885
Total loans	244,322	247,278
90 Days Past Due and Still Accruing	0	0
Real estate-mortgage [Member] \| 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	1,823	2,373
Real estate-mortgage [Member] \| 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	686	671
Real estate-mortgage [Member] \| 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	1,030	841
Consumer [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Current	19,511	19,262
Past Due	477	121
Total loans	19,988	19,383
90 Days Past Due and Still Accruing	0	0
Consumer [Member] \| 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	469	76
Consumer [Member] \| 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	8	45
Consumer [Member] \| 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Past Due	$ 0	$ 0

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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Financing receivables that are current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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