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Fair Value Measurements - Fair value of assets measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | $ 298,103 | $ 239,300
Equity securities, at fair value | 2,324 | 1,869
U.S Treasuries |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 49,511 | 30,543
U.S. government and federal agencies |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 31,960 | 34,537
Corporate bonds |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 2,965 | 1,031
Collateralized mortgage obligations |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 37,357 | 39,049
Tax-exempt municipal |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 4,851 | 5,262
Taxable municipal |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 1,649 | 1,685
Mortgage-backed |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 169,810 | 127,193
Fair Value, Recurring |  |
Securities available-for-sale: |  |
Equity securities, at fair value | 2,324 | 1,869
Total assets at fair value | 300,427 | 241,169
Fair Value, Recurring | U.S Treasuries |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 49,511 | 30,543
Fair Value, Recurring | U.S. government and federal agencies |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 31,960 | 34,537
Fair Value, Recurring | Corporate bonds |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 2,965 | 1,031
Fair Value, Recurring | Collateralized mortgage obligations |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 37,357 | 39,049
Fair Value, Recurring | Tax-exempt municipal |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 4,851 | 5,262
Fair Value, Recurring | Taxable municipal |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 1,649 | 1,685
Fair Value, Recurring | Mortgage-backed |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 169,810 | 127,193
Fair Value, Recurring | Fair Value, Inputs, Level 1 |  |
Securities available-for-sale: |  |
Equity securities, at fair value | 2,324 | 1,869
Total assets at fair value | 2,324 | 1,869
Fair Value, Recurring | Fair Value, Inputs, Level 2 |  |
Securities available-for-sale: |  |
Total assets at fair value | 298,103 | 239,300
Fair Value, Recurring | Fair Value, Inputs, Level 2 | U.S Treasuries |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 49,511 | 30,543
Fair Value, Recurring | Fair Value, Inputs, Level 2 | U.S. government and federal agencies |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 31,960 | 34,537
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Corporate bonds |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 2,965 | 1,031
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Collateralized mortgage obligations |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 37,357 | 39,049
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Tax-exempt municipal |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 4,851 | 5,262
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Taxable municipal |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | 1,649 | 1,685
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Mortgage-backed |  |
Securities available-for-sale: |  |
Securities available-for-sale, at fair value | $ 169,810 | $ 127,193

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