| Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Interest and fees on loans | 22 | 24 | 23 | 23 | 24 | 25 | 27 | 30 | 33 | 34 | 36 | 38 | 49 | 59 |
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| Taxable | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 4 | 5 | 5 |
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| Tax exempt | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 |
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| Dividends | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
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| Interest Income, Federal Funds Sold | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
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| Interest on interest bearing deposits in banks | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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| Total interest and dividend income | 24 | 25 | 24 | 25 | 25 | 27 | 29 | 32 | 36 | 37 | 39 | 44 | 57 | 68 |
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| Interest on deposits | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 5 | 5 | 3 | 4 | 16 | 21 |
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| Interest on short-term borrowed funds | - | - | - | - | - | - | - | - | - | - | - | 0 | 1 | 1 |
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| Interest on long-term borrowed funds | - | - | - | - | - | - | - | - | - | - | 0 | - | 1 | 7 |
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| Interest on subordinated notes | - | - | - | - | - | - | - | - | - | - | 0 | 1 | 1 | 1 |
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| Total interest expense | - | - | - | - | - | - | - | - | - | - | - | - | - | 30 |
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| Net interest income | 20 | 22 | 22 | 23 | 23 | 25 | 27 | 29 | 30 | 32 | 36 | 39 | 38 | 38 |
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| Credit loss expense (benefit), net | - | - | - | - | - | - | - | - | - | - | - | - | -0 | 1 |
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| Net interest income after credit loss expense (benefit) | 19 | 21 | 22 | 22 | 23 | 25 | 27 | 28 | 30 | 29 | 36 | 39 | 38 | 37 |
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| Wealth management income | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 |
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| Service fees | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 |
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| Debt Securities, Available-for-Sale, Realized Gain (Loss) | - | - | - | - | - | - | - | - | - | 0 | - | 0 | - | -1 |
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| Gain (Loss) on Sales of Loans, Net | 2 | 4 | 2 | 2 | 3 | 3 | 2 | 2 | 3 | 8 | 5 | 1 | 1 | 2 |
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| Net gains on other investments | - | - | - | - | - | - | - | - | - | 0 | -0 | -0 | 0 | 0 |
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| Other income | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
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| Total noninterest income | 7 | 11 | 9 | 9 | 10 | 10 | 9 | 9 | 10 | 16 | 13 | 9 | 10 | 10 |
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| Salaries and wages | - | - | - | - | 10 | 10 | 10 | 11 | 12 | 13 | 14 | 14 | 14 | 16 |
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| Employee benefits | - | - | - | - | - | - | - | 4 | 4 | 5 | 5 | 5 | 5 | 6 |
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| Occupancy, Net | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 |
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| Equipment expense | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 |
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| Other expenses | 3 | 8 | 7 | 7 | 7 | 7 | 6 | 7 | 7 | 8 | 8 | 8 | 10 | 10 |
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| Total noninterest expenses | 20 | 23 | 21 | 22 | 22 | 24 | 24 | 29 | 27 | 30 | 33 | 33 | 35 | 38 |
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| Income before provision for income taxes | - | - | - | - | - | - | - | - | - | - | 16 | 15 | 13 | 9 |
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| Provision for income taxes | 1 | 2 | 2 | 2 | 2 | 2 | 4 | 1 | 2 | 2 | 3 | 3 | 2 | 0 |
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| Net income | 5 | 7 | 7 | 8 | 8 | 9 | 8 | 7 | 11 | 13 | 13 | 13 | 11 | 9 |
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| Earnings Per Share, Basic | 1.17 | 1.54 | 1.6 | 1.73 | 1.77 | 1.91 | 1.89 | 1.58 | 2.38 | 2.86 | 2.94 | 2.81 | 2.5 | 1.94 |
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| Earnings Per Share, Diluted | 1.17 | 1.54 | 1.6 | 1.73 | 1.77 | 1.91 | 1.89 | 1.58 | 2.38 | 2.85 | 2.92 | 2.79 | 2.48 | 1.92 |
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| Common Stock, Dividends, Per Share, Declared | 1 | 1 | 1.01 | 1.04 | 1.08 | 1.11 | 1.16 | 1.2 | 1.24 | 1.28 | 1.32 | 1.4 | 1.44 | 1.44 |
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