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Fair Values of Financial Instruments (Quantitative Information about Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Impaired Loans [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impaired Loans |  | $ 8,857 | $ 10,369
Impaired Loans [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impaired Loans |  | 8,857 | 10,369
Other Real Estate Owned [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Other real estate owned |  | 1,178 | 532
Other Real Estate Owned [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Other real estate owned |  | 1,178 | 532
Appraisal of Collateral [Member] | Appraisal Adjustments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impaired Loans |  | $ 8,857 | $ 10,369
Valuation Techniques | [1] | Appraisal of collateral | Appraisal of collateral
Unobservable Input | [2] | Appraisal adjustments | Appraisal adjustments
Appraisal of Collateral [Member] | Appraisal Adjustments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member] | Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Range |  | 0.00% | 0.00%
Appraisal of Collateral [Member] | Appraisal Adjustments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member] | Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Range |  | 10.00% | 10.00%
Appraisal of Collateral [Member] | Appraisal Adjustments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Other real estate owned |  | $ 1,178 | $ 532
Valuation Techniques | [1] | Appraisal of collateral | Appraisal of collateral
Unobservable Input | [2] | Appraisal adjustments | Appraisal adjustments
Appraisal of Collateral [Member] | Appraisal Adjustments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned [Member] | Minimum [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Range |  | 0.00% | 0.00%
Appraisal of Collateral [Member] | Appraisal Adjustments [Member] | Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate Owned [Member] | Maximum [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Range |  | 10.00% | 10.00%
[1] | Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not objectively determinable.
[2] | Appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Description of significant assumptions used by management to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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