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Disclosures About Fair Value of Financial Instruments - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Agency mortgage-backed securities |  |
Recurring Assets, Fair Value Disclosure | $ 169,940,000 | $ 165,042,000
Agency collateralized mortgage obligations |  |
Recurring Assets, Fair Value Disclosure | 176,621,000 | 151,950,000
States and political subdivisions securities |  |
Recurring Assets, Fair Value Disclosure | 47,325,000 | 35,125,000
Small Business Administration securities |  |
Recurring Assets, Fair Value Disclosure | 21,047,000 | 22,058,000
Interest Rate Derivative Asset |  |
Recurring Assets, Fair Value Disclosure | 5,062,000 | 31,476,000
Interest Rate Derivative Liability |  |
Recurring Assets, Fair Value Disclosure | (5,454,000) | (1,547,000)
Fair Value, Inputs, Level 1 |  |
Securities at fair value | 0 | 0
Fair Value, Inputs, Level 2 | Agency mortgage-backed securities |  |
Recurring Assets, Fair Value Disclosure | 169,940,000 | 165,042,000
Fair Value, Inputs, Level 2 | Agency collateralized mortgage obligations |  |
Recurring Assets, Fair Value Disclosure | 176,621,000 | 151,950,000
Fair Value, Inputs, Level 2 | States and political subdivisions securities |  |
Recurring Assets, Fair Value Disclosure | 47,325,000 | 35,125,000
Fair Value, Inputs, Level 2 | Small Business Administration securities |  |
Recurring Assets, Fair Value Disclosure | 21,047,000 | 22,058,000
Fair Value, Inputs, Level 2 | Interest Rate Derivative Asset |  |
Recurring Assets, Fair Value Disclosure | 5,062,000 | 31,476,000
Fair Value, Inputs, Level 2 | Interest Rate Derivative Liability |  |
Recurring Assets, Fair Value Disclosure | (5,454,000) | (1,547,000)
Fair Value, Inputs, Level 3 |  |
Securities at fair value | $ 0 | $ 0

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