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INVESTMENT SECURITIES - Amortized Cost and Estimated Fair Value of Securities Held-to-Maturity (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 134,175 | $ 134,864
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (18,082) | (20,326)
Estimated Fair Value | 116,093 | 114,538
State, county and municipal securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 31,905 | 31,905
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (4,575) | (5,380)
Estimated Fair Value | 27,330 | 26,525
Mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 102,270 | 102,959
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (13,507) | (14,946)
Estimated Fair Value | $ 88,763 | $ 88,013

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