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Fair Value (Details Textual) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Valuation allowance for impaired loans | $ 34 | $ 625
Provision for impaired loan losses |  | (294)
Other real estate owned | 520 | 1,880
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 140 | 3,882
Valuation allowance for impaired loans | $ 34 | $ 625
Fair Value Measurements Unobservable Inputs | Discount rate for age of appraisal and market conditions | Discount rate for age of appraisal and market conditions
Other Real Estate [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Real estate, other deductions | $ 527 | $ 951
Other Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | 520 | 1,880
Other real estate owned | $ 500 | $ 1,900
Fair Value Measurements Unobservable Inputs | Discount rate for age of appraisal and market conditions | Discount rate for age of appraisal and market conditions
State and Municipal Obligation [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | $ 3,135 | $ 3,680
Fair Value Measurements Unobservable Inputs | Discount rate Probability of default | Discount rate Probability of default
Commercial Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | $ 300 | $ 1,700
Residential Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair Value | $ 217 | $ 212
Measurement Input, Discount Rate [Member] | Minimum [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Real Estate, measurement input | 0.00 |
Measurement Input, Discount Rate [Member] | Minimum [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Impaired loans, measurement input | 0.0000 | 0.0000
Measurement Input, Discount Rate [Member] | Minimum [Member] | Other Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Real Estate, measurement input | 0.0500 | 0.0500
Measurement Input, Discount Rate [Member] | Minimum [Member] | State and Municipal Obligation [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
State and Municipal Obligations, measurement input | 0.0305 | 0.0305
Measurement Input, Discount Rate [Member] | Maximum [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Real Estate, measurement input | 0.50 |
Measurement Input, Discount Rate [Member] | Maximum [Member] | Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Impaired loans, measurement input | 0.5000 | 0.5000
Measurement Input, Discount Rate [Member] | Maximum [Member] | Other Real Estate [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Other Real Estate, measurement input | 0.2000 | 0.2000
Measurement Input, Discount Rate [Member] | Maximum [Member] | State and Municipal Obligation [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
State and Municipal Obligations, measurement input | 0.0550 | 0.0550

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