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INVESTMENT SECURITIES - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
INVESTMENT SECURITIES |  |  |  |  |  |
Securities transferred from available for sale portfolio to held to maturity portfolio |  | $ 226,500 |  | $ 0 |  |
Net unrealized gains on transfers |  | 1,000 |  |  |  |
Net of income tax |  | $ 775 |  |  |  |
Net unrealized gains on transfers |  |  |  | 39 |  |
Net of income tax |  |  |  | 30 |  |
Fair value of debt securities reported less than their historical cost | $ 481,600 |  |  | $ 481,600 |  | $ 173,900
Debt securities reported less than their historical cost percent of investment portfolio | 99.70% |  |  | 99.70% |  | 34.70%
Held-to-maturity securities | $ 206,485 |  |  | $ 206,485 |  | $ 0
Total fair value of held-to-maturity | 180,411 |  |  | 180,411 |  |
Available for sale securities sold | 5,100 |  | $ 0 | 10,200 | $ 0 |
Available-for-sale securities, recognized gain | $ 31 |  |  | $ 38 |  |

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