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Fair Value (Narrative) (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value assets and liabilities transfer level 1 to level 3 | 0 |  | 0
Fair value assets and liabilities transfer level 3 to level 1 | 0 |  | 0
Unpaid principal balance of impairment loan at collateral | $ 3,067,000 |  | $ 3,087,000
Valuation allowance | 26,000 |  | 24,000
Fair value option, 90 days or more past due | 0 |  | 0
Write-downs of impaired collateral-dependent loans | 0 | $ 0 |
Loans 90 days or more past due and still accruing interest |  |  |
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 0 |  | 0
Liabilities measured at fair value on a recurring basis | 0 |  | 0
Assets measured at fair value on a nonrecurring basis | 0 |  | 0
Liabilities measured at fair value on a nonrecurring basis | 0 |  | 0
Fair Value, Inputs, Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets measured at fair value on a nonrecurring basis | 0 |  | 0
Liabilities measured at fair value on a nonrecurring basis | 0 |  | 0
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Assets measured at fair value on a recurring basis | 0 |  | 0
Liabilities measured at fair value on a recurring basis | $ 0 |  | $ 0

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- Definition Fair value assets and liabilities transfer level 1 to level 3 + References No definition available. + Details
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- Definition Fair value assets and liabilities transfer level 3 to level 1 + References No definition available. + Details
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- Definition Mortgage servicing rights (MSR) valuation allowances. + References No definition available. + Details
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- Definition Unpaid principal balance of impaired loans carried at fair value of collateral. + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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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 This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References 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 + Details
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- Definition Aggregation of the liabilities reported on the balance sheet measured at fair value on a nonrecurring basis by the entity. + References No definition available. + Details
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