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Fair Value Measurements - Mortgage Servicing Rights - Summary (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Assets: |  |
Available for sale debt securities, fair value | $ 213,181 | $ 218,205
Mortgage servicing rights, fair value | 2,657 | 2,931
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Available for sale debt securities, fair value | 2,690 | 1,952
Mortgage servicing rights, fair value | 0 | 0
Assets, Total | 50,460 | 62,456
Other Observable Inputs (Level 2) |  |
Assets: |  |
Available for sale debt securities, fair value | 210,491 | 216,253
Mortgage servicing rights, fair value | 0 | 0
Assets, Total | 218,390 | 224,458
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Mortgage servicing rights, fair value | 2,657 | 2,931
Assets, Total | 1,127,097 | 1,117,934
Recurring |  |
Assets: |  |
Assets, Total | 215,851 | 221,148
Recurring | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 2,690 | 1,952
Recurring | U.S. government and federal agency obligations |  |
Assets: |  |
Available for sale debt securities, fair value | 9,182 | 9,966
Recurring | Government sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 34,779 | 43,335
Recurring | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 38,626 | 40,386
Recurring | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 123,449 | 118,192
Recurring | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 3,152 | 3,000
Recurring | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 1,303 | 1,374
Recurring | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 13 | 12
Recurring | Mortgage servicing rights (MSRs) |  |
Assets: |  |
Mortgage servicing rights, fair value | 2,657 | 2,931
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Assets, Total | 2,703 | 1,964
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 2,690 | 1,952
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 | 13 | 12
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 | 210,491 | 216,253
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 | 9,182 | 9,966
Recurring | Other Observable Inputs (Level 2) | Government sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 34,779 | 43,335
Recurring | Other Observable Inputs (Level 2) | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 38,626 | 40,386
Recurring | Other Observable Inputs (Level 2) | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 123,449 | 118,192
Recurring | Other Observable Inputs (Level 2) | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 3,152 | 3,000
Recurring | Other Observable Inputs (Level 2) | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 1,303 | 1,374
Recurring | Other Observable Inputs (Level 2) | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
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 | 2,657 | 2,931
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 | $ 2,657 | $ 2,931

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