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DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) | Sep. 30, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Agency mortgage-backed securities. |  |  |
Recurring Assets, Fair Value Disclosure | $ 168,820,000 |  | $ 169,940,000
Agency collateralized mortgage obligations |  |  |
Recurring Assets, Fair Value Disclosure | 205,731,000 |  | 176,621,000
States and political subdivisions securities |  |  |
Recurring Assets, Fair Value Disclosure | 40,037,000 |  | 47,325,000
Small Business Administration securities |  |  |
Recurring Assets, Fair Value Disclosure | 18,350,000 |  | 21,047,000
Interest rate derivative asset |  |  |
Recurring Assets, Fair Value Disclosure | 3,707,000 |  | 5,062,000
Interest rate derivative liability |  |  |
Recurring Assets, Fair Value Disclosure | (3,758,000) |  | (5,454,000)
Fair Value, Inputs, Level 2 | Agency mortgage-backed securities. |  |  |
Recurring Assets, Fair Value Disclosure | 168,820,000 |  | 169,940,000
Fair Value, Inputs, Level 2 | Agency collateralized mortgage obligations |  |  |
Recurring Assets, Fair Value Disclosure | 205,731,000 |  | 176,621,000
Fair Value, Inputs, Level 2 | States and political subdivisions securities |  |  |
Recurring Assets, Fair Value Disclosure | 40,037,000 |  | 47,325,000
Fair Value, Inputs, Level 2 | Small Business Administration securities |  |  |
Recurring Assets, Fair Value Disclosure | 18,350,000 |  | 21,047,000
Fair Value, Inputs, Level 2 | Interest rate derivative asset |  |  |
Recurring Assets, Fair Value Disclosure | 3,707,000 |  | 5,062,000
Fair Value, Inputs, Level 2 | Interest rate derivative liability |  |  |
Recurring Assets, Fair Value Disclosure | $ (3,758,000) |  | (5,454,000)
Fair Value, Inputs, Level 3 |  |  |
Securities at fair value |  | $ 0 | $ 0

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