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INVESTMENT SECURITIES (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items] |  |  |
Money market investments | $ 4,161 | $ 8,952 | $ 11,908
Restricted cash | 157 | 175 | 1,375
Securitized GNMA pools retained, amortized cost | $ 112,400 | $ 149,100 | $ 90,100
Securitized GNMA pool retained, yield | 3.90% | 2.45% | 2.48%
Retained FNMA pools | $ 13,700 | $ 0 | $ 0
FNMA pools retained, yield | 4.97% |  |
12 months or more | $ 137,984 | 0 |
Held to maturity securities in continuous loss position for 12 months or more |  | 0 |
Mortgage-backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Proceeds from sale of available for sale securities |  | 2,200 | 316,256
Gain (loss) on sales of mortgaged-backed securities |  | 19 | 4,728
Investment securities | US Treasury securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Available for sale, purchase price | 550,000 | 0 | $ 75,000
Purchase of held-to-maturity securities | 200,000 |  |
Proceeds from sale of available for sale securities | 242,400 |  |
Gain (loss) on sales of mortgaged-backed securities | (247) |  |
Asset Pledged as Collateral |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Pledged assets | 294,200 | 145,600 |
OIB |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Restricted cash | 305 | 305 |
Oriental Overseas |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Restricted cash | 325 | 325 |
Public Funds | Asset Pledged as Collateral |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Pledged assets | $ 293,700 | $ 143,800 |

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