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Disclosures About Fair Value of Assets and Liabilities - Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements Other Than Goodwill (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
State and municipal securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair Value | $ 2,940 | $ 3,293
State and municipal securities | Discounted cash flow | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Maturity/Call date | 1 month | 1 month
US Muni BQ curve | A- | A-
State and municipal securities | Discounted cash flow | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Maturity/Call date | 15 years | 20 years
US Muni BQ curve | BBB- | BBB-
Corporate obligations and U.S. Government-sponsored mortgage backed securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair Value | $ 35 |
Corporate obligations and equity securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair Value |  | $ 35
Impaired loans (collateral dependent) | Collateral based measurements |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair Value | 12,966 | 11,866
Other real estate owned | Appraisals |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair Value | $ 174 | $ 657
Discount rate | State and municipal securities | Discounted cash flow | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount rate | 0.02 | 0.0069
Discount rate | State and municipal securities | Discounted cash flow | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount rate | 0.05 | 0.05
Risk free rate | Corporate obligations and U.S. Government-sponsored mortgage backed securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Risk free rate | 3 month LIBOR |
Risk free rate | Corporate obligations and equity securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Risk free rate |  | 3 month LIBOR
Discount to reflect current market conditions | Corporate obligations and U.S. Government-sponsored mortgage backed securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount rate | 0.0200 |
Discount to reflect current market conditions | Corporate obligations and equity securities | Discounted cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount rate |  | 0.0200
Discount to reflect current market conditions and ultimate collectability | Impaired loans (collateral dependent) | Collateral based measurements | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect current market conditions and ultimate collectability | 0 | 0
Discount to reflect current market conditions and ultimate collectability | Impaired loans (collateral dependent) | Collateral based measurements | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect current market conditions and ultimate collectability | 0.10 | 0.10
Discount to reflect current market conditions and ultimate collectability | Impaired loans (collateral dependent) | Collateral based measurements | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect current market conditions and ultimate collectability | 0.04 | 0.06
Discount to reflect current market conditions | Other real estate owned | Appraisals | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other real estate owned | 0 | 0
Discount to reflect current market conditions | Other real estate owned | Appraisals | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other real estate owned | 0.51 | 0.10
Discount to reflect current market conditions | Other real estate owned | Appraisals | Weighted Average |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other real estate owned | 0.30 | 0.04

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