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INVESTMENT SECURITIES (Investment Securities by Contractual Maturity - HTM) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 332,713 | $ 549,024
Gross Unrealized Gains | 51 | 55
Gross Unrealized Losses | 48,515 | 58,315
Fair Value | $ 284,249 | $ 490,764
Weighted Average Yield | 2.20% | 2.60%
FNMA and FHLMC certificates | Due after 10 years | Mortgage-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 297,713 | $ 314,710
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 48,515 | 56,767
Fair Value | $ 249,198 | $ 257,943
Weighted Average Yield | 1.73% | 1.72%
US Treasury securities | Due less than 1 year | Investment securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost |  | $ 199,314
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 1,548
Fair Value |  | $ 197,766
Weighted Average Yield |  | 3.33%
Other debt securities available for sale | Due from 1 to 5 years | Investment securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized Cost | $ 35,000 | $ 35,000
Gross Unrealized Gains | 51 | 55
Gross Unrealized Losses | 0 | 0
Fair Value | $ 35,051 | $ 35,055
Weighted Average Yield | 6.20% | 6.36%

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