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Fair Value Measurements - Mortgage Servicing Rights - Summary (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Assets: |  |
Available for sale debt securities, fair value | $ 218,205 | $ 231,028
Mortgage servicing rights, fair value | 2,931 | 2,713
Recurring |  |
Assets: |  |
Assets, Total | 221,148 | 233,751
Recurring | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 1,952 | 1,967
Recurring | U.S. government and federal agency obligations |  |
Assets: |  |
Available for sale debt securities, fair value | 9,966 | 12,073
Recurring | Government sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 43,335 | 36,897
Recurring | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 40,386 | 46,656
Recurring | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 118,192 | 128,949
Recurring | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 3,000 | 3,000
Recurring | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 1,374 | 1,486
Recurring | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 12 | 10
Recurring | Mortgage servicing rights (MSRs) |  |
Assets: |  |
Mortgage servicing rights, fair value | 2,931 | 2,713
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Assets, Total | 1,952 | 1,967
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 1,952 | 1,967
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and federal agency obligations |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage servicing rights (MSRs) |  |
Assets: |  |
Mortgage servicing rights, fair value | 0 | 0
Recurring | Other Observable Inputs (Level 2) |  |
Assets: |  |
Assets, Total | 216,265 | 229,071
Recurring | Other Observable Inputs (Level 2) | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Other Observable Inputs (Level 2) | U.S. government and federal agency obligations |  |
Assets: |  |
Available for sale debt securities, fair value | 9,966 | 12,073
Recurring | Other Observable Inputs (Level 2) | Government sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 43,335 | 36,897
Recurring | Other Observable Inputs (Level 2) | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 40,386 | 46,656
Recurring | Other Observable Inputs (Level 2) | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 118,192 | 128,949
Recurring | Other Observable Inputs (Level 2) | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 3,000 | 3,000
Recurring | Other Observable Inputs (Level 2) | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 1,374 | 1,486
Recurring | Other Observable Inputs (Level 2) | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 12 | 10
Recurring | Other Observable Inputs (Level 2) | Mortgage servicing rights (MSRs) |  |
Assets: |  |
Mortgage servicing rights, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Assets, Total | 2,931 | 2,713
Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | U.S. government and federal agency obligations |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Government sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage servicing rights (MSRs) |  |
Assets: |  |
Mortgage servicing rights, fair value | $ 2,931 | $ 2,713

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