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Fair Value Measurements - Mortgage Servicing Rights - Summary (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Assets: |  |
Available for sale debt securities, fair value | $ 278,528 | $ 198,030
Mortgage servicing rights, fair value | 2,718 | 2,445
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Available for sale debt securities, fair value | 3,029 | 2,798
Assets, Total | 130,588 | 199,209
Other Observable Inputs (Level 2) |  |
Assets: |  |
Available for sale debt securities, fair value | 275,499 | 195,232
Assets, Total | 283,957 | 204,004
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Available for sale debt securities, fair value | 0 | 0
Assets, Total | 1,278,460 | 1,293,956
Recurring |  |
Assets: |  |
Assets, Total | 281,298 | 200,507
Recurring | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 3,029 | 2,798
Recurring | U.S. government and federal agency obligations |  |
Assets: |  |
Available for sale debt securities, fair value | 1,333 | 11,929
Recurring | U.S. government-sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 17,566 | 22,874
Recurring | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 118,911 | 58,744
Recurring | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 125,013 | 90,112
Recurring | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 11,395 | 10,344
Recurring | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 1,281 | 1,229
Recurring | Equity securities |  |
Assets: |  |
Available for sale debt securities, fair value | 52 | 32
Recurring | Mortgage servicing rights (MSRs) |  |
Assets: |  |
Mortgage servicing rights, fair value | 2,718 | 2,445
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Assets, Total | 3,081 | 2,830
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury |  |
Assets: |  |
Available for sale debt securities, fair value | 3,029 | 2,798
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) | U.S. 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 | 52 | 32
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 | 275,499 | 195,232
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 | 1,333 | 11,929
Recurring | Other Observable Inputs (Level 2) | U.S. government-sponsored enterprises |  |
Assets: |  |
Available for sale debt securities, fair value | 17,566 | 22,874
Recurring | Other Observable Inputs (Level 2) | Obligations of states and political subdivisions |  |
Assets: |  |
Available for sale debt securities, fair value | 118,911 | 58,744
Recurring | Other Observable Inputs (Level 2) | Mortgage-backed securities |  |
Assets: |  |
Available for sale debt securities, fair value | 125,013 | 90,112
Recurring | Other Observable Inputs (Level 2) | Other debt securities |  |
Assets: |  |
Available for sale debt securities, fair value | 11,395 | 10,344
Recurring | Other Observable Inputs (Level 2) | Bank issued trust preferred securities |  |
Assets: |  |
Available for sale debt securities, fair value | 1,281 | 1,229
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 | 2,718 | 2,445
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) | U.S. 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 | $ 2,718 | $ 2,445

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