Summary of Significant Accounting Policies (Details)	12 Months Ended
Dec. 31, 2017 USD ($) branch	Dec. 31, 2016 USD ($)
Significant Accounting Policies [Line Items]
Number of full service offices \| branch	24
HTM transfers to AFS securities, fair value	$ 0	$ 23,100,000
Real Estate - owner-occupied percentage minimum for collateral	50.00%
Foreclosed assets	$ 70,000	362,000
Excess tax benefit from exercise of stock options and vesting of restricted shares	853,000
Retained earnings	103,419,000	$ 92,904,000
Adjustments for New Accounting Principle, Early Adoption [Member] \| Accounting Standards Update 2018-02 [Member]
Significant Accounting Policies [Line Items]
Retained earnings	$ 501,000
Maximum \| Core deposits
Significant Accounting Policies [Line Items]
Estimated useful life of intangible asset	10 years
Premises \| Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives of premises and equipment	20 years
Premises \| Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives of premises and equipment	40 years
Leasehold improvements, furniture, fixtures and equipment \| Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives of premises and equipment	3 years
Leasehold improvements, furniture, fixtures and equipment \| Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives of premises and equipment	10 years

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Number of Full Service Offices

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[Line Items] for Significant Accounting Policies [Table]

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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