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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - HTM) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 359,806 | $ 367,507
Fair Value | 329,969 | 363,653
Due after 10 years | Mortgage-backed securities | FNMA and FHLMC certificates |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | 359,806 | 367,507
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 29,837 | 3,854
Fair Value | $ 329,969 | $ 363,653
Weighted Average Yield | 1.71% | 1.71%

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