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INVESTMENT SECURITIES - Held to maturity securities (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
HELD-TO-MATURITY SECURITIES: |  |
Amortized cost | $ 200,332 | $ 202,377
Fair Value Adjustment | 95 | 118
Amortized Carrying Value | 200,427 | 202,495
Gross Unrealized Losses | 20,574 | 24,730
Fair Value | 179,853 | 177,765
Agency mortgage-backed securities |  |
HELD-TO-MATURITY SECURITIES: |  |
Amortized cost | 73,612 | 73,891
Fair Value Adjustment | 2,870 | 3,015
Amortized Carrying Value | 76,482 | 76,906
Gross Unrealized Losses | 8,247 | 9,820
Fair Value | 68,235 | 67,086
Agency collateralized mortgage obligations |  |
HELD-TO-MATURITY SECURITIES: |  |
Amortized cost | 120,494 | 122,247
Fair Value Adjustment | (2,767) | (2,885)
Amortized Carrying Value | 117,727 | 119,362
Gross Unrealized Losses | 11,735 | 14,129
Fair Value | 105,992 | 105,233
States and political subdivisions |  |
HELD-TO-MATURITY SECURITIES: |  |
Amortized cost | 6,226 | 6,239
Fair Value Adjustment | (8) | (12)
Amortized Carrying Value | 6,218 | 6,227
Gross Unrealized Losses | 592 | 781
Fair Value | $ 5,626 | $ 5,446

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