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Investment Securities - Narrative (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) municipal_security | Dec. 31, 2022 USD ($) security state | Dec. 31, 2021 USD ($) security | Sep. 30, 2014 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Number of securities temporarily impaired (security) | security |  | 869 | 163 |
Number of securities temporarily impaired for 12 months or more (security) | security |  | 300 | 27 |
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)
Unamortized balance of net unrealized losses transferred |  | $ 64,000 | $ 87,000 |
Number of states | state |  | 6 |  |
Federal home loan bank stock |  | $ 2,846,000 | 4,328,000 |
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) | municipal_security | 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 |  | $ 350,411,000 | $ 347,456,000 |

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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=123599499&loc=d3e63345-112809 + Details
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