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Investment Securities - Narrative (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) security state | Dec. 31, 2020 USD ($) security | Jun. 30, 2020 loan | Sep. 30, 2014 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities temporarily impaired (security) | security | 163 | 50 |  |
Number of securities temporarily impaired for 12 months or more (security) | security | 27 | 10 |  |
Period of temporary impairment | 12 months | 12 months |  |
Amortized cost of securities transferred |  |  |  | $ 89,780,000
Fair value of securities transferred |  |  |  | 89,757,000
Net unrealized gains (losses) on securities transferred |  |  |  | $ (15,000)
Net unrealized loss on securities transferred from available for sale to held to maturity | $ (87,000) | $ (133,000) |  |
Number of states | state | 6 |  |  |
Federal Home Loan Bank Stock | $ 4,328,000 | 9,508,000 |  |
Federal Reserve Bank Stock | 1,037,000 | 1,037,000 |  |
Impairment losses | 0 |  |  |
State and political subdivisions |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities temporarily impaired (security) | loan |  |  | 28 |
Proceeds from sale of held-to-maturity securities | 8,600,000 |  |  |
Cumulative book value | 8,332,000 |  |  |
Net realized gain from sale of municipal securities | 268,000 |  |  |
Other equity securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Securities pledged as collateral | $ 347,456,000 | $ 297,326,000 |  |

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