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INVESTMENT SECURITIES - Held to maturity securities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
HELD-TO-MATURITY SECURITIES: |  |
Amortized Cost | $ 193,478 | $ 195,088
Fair Value Adjustment | (112) | (65)
Amortized Carrying Value | 193,366 | 195,023
Gross Unrealized Losses | 25,610 | 23,830
Fair Value | 167,756 | 171,193
Agency mortgage-backed securities |  |
HELD-TO-MATURITY SECURITIES: |  |
Amortized Cost | 72,194 | 72,495
Fair Value Adjustment | 2,293 | 2,436
Amortized Carrying Value | 74,487 | 74,931
Gross Unrealized Losses | 9,210 | 8,686
Fair Value | 65,277 | 66,245
Agency collateralized mortgage obligations |  |
HELD-TO-MATURITY SECURITIES: |  |
Amortized Cost | 115,110 | 116,405
Fair Value Adjustment | (2,410) | (2,502)
Amortized Carrying Value | 112,700 | 113,903
Gross Unrealized Losses | 15,819 | 14,662
Fair Value | 96,881 | 99,241
States and political subdivisions |  |
HELD-TO-MATURITY SECURITIES: |  |
Amortized Cost | 6,174 | 6,188
Fair Value Adjustment | 5 | 1
Amortized Carrying Value | 6,179 | 6,189
Gross Unrealized Losses | 581 | 482
Fair Value | $ 5,598 | $ 5,707

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