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Fair Value of Assets and Liabilities - Significant Assumptions Used in Valuation of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
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Jun. 30, 2020 | Dec. 31, 2019
Mortgage Servicing Rights | Level 3 | Minimum | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 9.00% | 9.50%
Mortgage Servicing Rights | Level 3 | Maximum | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 11.00% | 12.50%
Mortgage Servicing Rights | Level 3 | Weighted Average | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 9.10% | 9.70%
Impaired Loans (Collateral Dependent) | Level 3 | Minimum | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 0.00% | 0.00%
Impaired Loans (Collateral Dependent) | Level 3 | Maximum | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 40.00% | 40.00%
Impaired Loans (Collateral Dependent) | Level 3 | Weighted Average | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 20.00% | 20.00%
Foreclosed Assets Held-for-sale | Level 3 | Minimum | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 0.00% | 0.00%
Foreclosed Assets Held-for-sale | Level 3 | Maximum | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 40.00% | 40.00%
Foreclosed Assets Held-for-sale | Level 3 | Weighted Average | Third Party Valuations |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Discount to reflect realizable value | 35.00% | 35.00%
Fair Value, Nonrecurring | Mortgage Servicing Rights |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Assets, Fair Value | $ 899 | $ 1,444
Fair Value, Nonrecurring | Impaired Loans (Collateral Dependent) |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Assets, Fair Value | 8,358 | 12,727
Fair Value, Nonrecurring | Foreclosed Assets Held-for-sale |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Assets, Fair Value | $ 21 | $ 935

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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