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Fair Value of Assets and Liabilities - Valuation Technique (Details) - Level 3 $ in Thousands | Sep. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
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Loans held for branch sale |  |
Valuation techniques and significant unobservable inputs |  |
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Loans Held-for-sale, Measurement Input [Extensible List] |  | us-gaap:MeasurementInputQuotedPriceMember
Loans held for branch sale | Sales contract |  |
Valuation techniques and significant unobservable inputs |  |
Loans held for sale |  | $ 32,031
Impaired loans | Appraisal value | Property specific adjustment |  |
Valuation techniques and significant unobservable inputs |  |
Impaired loans | $ 3,050 | 4,022
Foreclosed assets | Appraisal value | Property specific adjustment |  |
Valuation techniques and significant unobservable inputs |  |
Foreclosed assets | $ 84 | $ 204
Servicing rights |  |
Valuation techniques and significant unobservable inputs |  |
Servicing Asset, Valuation Technique [Extensible List] | us-gaap:ValuationTechniqueDiscountedCashFlowMember | us-gaap:ValuationTechniqueDiscountedCashFlowMember
Servicing rights | Prepayment speed assumptions |  |
Valuation techniques and significant unobservable inputs |  |
Servicing rights | $ 4,146 | $ 4,623
Servicing rights | Prepayment speed assumptions | Minimum |  |
Valuation techniques and significant unobservable inputs |  |
Servicing Asset, Measurement Input | 154 | 104
Servicing rights | Prepayment speed assumptions | Maximum |  |
Valuation techniques and significant unobservable inputs |  |
Servicing Asset, Measurement Input | 270 | 211
Servicing rights | Prepayment speed assumptions | Weighted average |  |
Valuation techniques and significant unobservable inputs |  |
Servicing Asset, Measurement Input | 194 | 130
Servicing rights | Discount rate |  |
Valuation techniques and significant unobservable inputs |  |
Servicing Asset, Measurement Input | 0.095 | 0.105
Servicing rights | Discount rate | Weighted average |  |
Valuation techniques and significant unobservable inputs |  |
Servicing Asset, Measurement Input | 0.095 | 0.105

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- Definition Indicates measurement input for loan held for sale. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746 + Details
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