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INVESTMENT SECURITIES (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Available-for-sale Securities, Amortized Cost Amount | $ 475,714 |
Available-for-sale Securities |  |
Available-for-sale Securities, Amortized Cost Amount | 475,714 | $ 489,198
Available-for-sale Securities, Gross Unrealized Gain | 1,663 | 15,119
Available-for-sale Securities, Gross Unrealized Loss | 16,002 | 3,285
Available-for-sale Securities, Fair Value | 461,375 | 501,032
Agency mortgage-backed securities. | Available-for-sale Securities |  |
Available-for-sale Securities, Amortized Cost Amount | 305,885 | 219,624
Available-for-sale Securities, Gross Unrealized Gain | 928 | 10,561
Available-for-sale Securities, Gross Unrealized Loss | 9,337 | 744
Available-for-sale Securities, Fair Value | 297,476 | 229,441
Agency collateralized mortgage obligations | Available-for-sale Securities |  |
Available-for-sale Securities, Amortized Cost Amount | 78,199 | 204,332
Available-for-sale Securities, Gross Unrealized Gain | 73 | 2,443
Available-for-sale Securities, Gross Unrealized Loss | 5,263 | 2,498
Available-for-sale Securities, Fair Value | 73,009 | 204,277
States and political subdivisions securities | Available-for-sale Securities |  |
Available-for-sale Securities, Amortized Cost Amount | 41,202 | 38,440
Available-for-sale Securities, Gross Unrealized Gain | 221 | 1,618
Available-for-sale Securities, Gross Unrealized Loss | 426 | 43
Available-for-sale Securities, Fair Value | 40,997 | 40,015
Small Business Administration securities | Available-for-sale Securities |  |
Available-for-sale Securities, Amortized Cost Amount | 50,428 | 26,802
Available-for-sale Securities, Gross Unrealized Gain | 441 | 497
Available-for-sale Securities, Gross Unrealized Loss | 976 |
Available-for-sale Securities, Fair Value | $ 49,893 | $ 27,299

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