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INVESTMENT SECURITIES - Summary of Investment Securities with Unrealized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value |  |
Less Than 12 Months | $ 284,581 | $ 112,563
12 Months or Longer | 296,109 | 613,010
Total | 580,690 | 725,573
Gross Unrealized Losses |  |
Less Than 12 Months | (3,459) | (477)
12 Months or Longer | (3,885) | (9,495)
Total | (7,344) | (9,972)
SBA loan pools securities |  |
Fair Value |  |
Less Than 12 Months | 0 | 17,354
12 Months or Longer | 14,591 | 0
Total | 14,591 | 17,354
Gross Unrealized Losses |  |
Less Than 12 Months | 0 | (82)
12 Months or Longer | (88) | 0
Total | (88) | (82)
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  |
Fair Value |  |
Less Than 12 Months | 67,588 |
12 Months or Longer | 0 |
Total | 67,588 |
Gross Unrealized Losses |  |
Less Than 12 Months | (1,311) |
12 Months or Longer | 0 |
Total | (1,311) |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  |
Fair Value |  |
Less Than 12 Months | 85,290 | 19,033
12 Months or Longer | 17,754 | 0
Total | 103,044 | 19,033
Gross Unrealized Losses |  |
Less Than 12 Months | (1,184) | (166)
12 Months or Longer | (904) | 0
Total | (2,088) | (166)
Municipal securities |  |
Fair Value |  |
Less Than 12 Months | 44,748 | 11,401
12 Months or Longer | 10,762 | 0
Total | 55,510 | 11,401
Gross Unrealized Losses |  |
Less Than 12 Months | (919) | (4)
12 Months or Longer | (620) | 0
Total | (1,539) | (4)
Collateralized loan obligations |  |
Fair Value |  |
Less Than 12 Months | 81,962 | 64,775
12 Months or Longer | 253,002 | 613,010
Total | 334,964 | 677,785
Gross Unrealized Losses |  |
Less Than 12 Months | (38) | (225)
12 Months or Longer | (2,273) | (9,495)
Total | (2,311) | $ (9,720)
Corporate debt securities |  |
Fair Value |  |
Less Than 12 Months | 4,993 |
12 Months or Longer | 0 |
Total | 4,993 |
Gross Unrealized Losses |  |
Less Than 12 Months | (7) |
12 Months or Longer | 0 |
Total | $ (7) |

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