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Disclosures About Fair Value of Financial Instruments - Fair value, assets measured on recurring basis (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Agency mortgage-backed securities |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | $ 280,231 | $ 286,482
Agency collateralized mortgage obligations |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 75,946 | 78,474
States and political subdivisions securities |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 58,137 | 57,495
Small Business Administration securities |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 63,893 | 68,141
Interest rate derivative asset |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 8,205 | 11,061
Interest rate derivative liability |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | (25,336) | (42,097)
Level 2 | Agency mortgage-backed securities |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 280,231 | 286,482
Level 2 | Agency collateralized mortgage obligations |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 75,946 | 78,474
Level 2 | States and political subdivisions securities |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 58,137 | 57,495
Level 2 | Small Business Administration securities |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 63,893 | 68,141
Level 2 | Interest rate derivative asset |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | 8,205 | 11,061
Level 2 | Interest rate derivative liability |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Assets fair value | (25,336) | (42,097)
Level 3 |  |
Fair value of recurring basis and the level within the fair value hierarchy in which the fair value measurements |  |
Available-for-Sale Securities | $ 0 | $ 0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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