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INVESTMENT SECURITIES (Tables) | 9 Months Ended
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Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of Amortized Cost and Fair Value of Available-for-Sale Investment Securities | The following table presents the amortized cost and fair value of the investment securities portfolio as of the dates indicated:
($ in thousands) |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Allowance for Credit Losses |  | Fair Value
September 30, 2023 |  |  |  |  |  |  |  |  |  |
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | $ | 152,748 |  |  | $ | — |  |  | $ | (35,680) |  |  | $ | — |  |  | $ | 117,068 |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 61,337 |  |  | — |  |  | (15,688) |  |  | — |  |  | 45,649 |
Municipal securities |  | 114,202 |  |  | — |  |  | (26,634) |  |  | — |  |  | 87,568 |
Total securities held-to-maturity |  | $ | 328,287 |  |  | $ | — |  |  | $ | (78,002) |  |  | $ | — |  |  | $ | 250,285 |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | 8,721 |  |  | $ | 5 |  |  | $ | (27) |  |  | $ | — |  |  | $ | 8,699 |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | 79,786 |  |  | — |  |  | (2,942) |  |  | — |  |  | 76,844 |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 93,696 |  |  | — |  |  | (7,864) |  |  | — |  |  | 85,832 |
Non-agency residential mortgage-backed securities |  | 120,062 |  |  | — |  |  | (15,102) |  |  | — |  |  | 104,960 |
Collateralized loan obligations |  | 489,940 |  |  | — |  |  | (6,136) |  |  | — |  |  | 483,804 |
Corporate debt securities |  | 175,804 |  |  | — |  |  | (19,853) |  |  | (1,036) |  |  | 154,915 |
Total securities available-for-sale |  | $ | 968,009 |  |  | $ | 5 |  |  | $ | (51,924) |  |  | $ | (1,036) |  |  | $ | 915,054 |
December 31, 2022 |  |  |  |  |  |  |  |  |  |
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | $ | 153,033 |  |  | $ | — |  |  | $ | (29,807) |  |  | $ | — |  |  | $ | 123,226 |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 61,404 |  |  | — |  |  | (11,946) |  |  | — |  |  | 49,458 |
Municipal securities |  | 114,204 |  |  | — |  |  | (24,428) |  |  | — |  |  | 89,776 |
Total securities held-to-maturity |  | $ | 328,641 |  |  | $ | — |  |  | $ | (66,181) |  |  | $ | — |  |  | $ | 262,460 |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | 11,241 |  |  | $ | — |  |  | $ | (54) |  |  | $ | — |  |  | $ | 11,187 |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | 40,431 |  |  | — |  |  | (225) |  |  | — |  |  | 40,206 |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 99,075 |  |  | — |  |  | (5,884) |  |  | — |  |  | 93,191 |
Non-agency residential mortgage-backed securities |  | 90,832 |  |  | — |  |  | (10,340) |  |  | — |  |  | 80,492 |
Collateralized loan obligations |  | 492,203 |  |  | — |  |  | (15,600) |  |  | — |  |  | 476,603 |
Corporate debt securities |  | 175,781 |  |  | 32 |  |  | (9,195) |  |  | — |  |  | 166,618 |
Total securities available-for-sale |  | $ | 909,563 |  |  | $ | 32 |  |  | $ | (41,298) |  |  | $ | — |  |  | $ | 868,297 |
Schedule of Proceeds from Sales and Calls of Securities and Associated Gross Gains and Losses | The following table presents proceeds from sales and calls of AFS securities and the associated gross gains and losses realized through earnings upon the sales and calls of AFS securities for the periods indicated:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
($ in thousands) |  | 2023 |  | 2022 |  | 2023 |  | 2022
Gross realized gains |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 209 |
Gross realized losses |  | — |  |  | — |  |  | — |  |  | (193) |
Net realized gains on sales and calls |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 16 |
Proceeds from sales and calls |  | $ | — |  |  | $ | — |  |  | $ | 20,000 |  |  | $ | 56,145 |
Schedule of Securities Available-for-Sale | The following table summarizes the AFS investment securities with unrealized losses by security type and length of time in a continuous, unrealized loss position as of the dates indicated:
|  | Less Than 12 Months |  | 12 Months or Longer |  | Total
($ in thousands) |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses |  | Fair Value |  | Gross Unrealized Losses
September 30, 2023 |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | — |  |  | $ | — |  |  | $ | 7,060 |  |  | $ | (27) |  |  | $ | 7,060 |  |  | $ | (27) |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | 76,844 |  |  | (2,942) |  |  | — |  |  | — |  |  | 76,844 |  |  | (2,942) |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 50,151 |  |  | (1,131) |  |  | 35,690 |  |  | (6,733) |  |  | 85,841 |  |  | (7,864) |
Non-agency residential mortgage-backed securities |  | 67,769 |  |  | (3,112) |  |  | 37,191 |  |  | (11,990) |  |  | 104,960 |  |  | (15,102) |
Collateralized loan obligations |  | 24,859 |  |  | (141) |  |  | 441,944 |  |  | (5,995) |  |  | 466,803 |  |  | (6,136) |
Corporate debt securities |  | 14,774 |  |  | (1,430) |  |  | 140,140 |  |  | (18,423) |  |  | 154,914 |  |  | (19,853) |
Total securities available-for-sale |  | $ | 234,397 |  |  | $ | (8,756) |  |  | $ | 662,025 |  |  | $ | (43,168) |  |  | $ | 896,422 |  |  | $ | (51,924) |
December 31, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | 2,260 |  |  | $ | (3) |  |  | $ | 8,927 |  |  | $ | (51) |  |  | $ | 11,187 |  |  | $ | (54) |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | 40,206 |  |  | (225) |  |  | — |  |  | — |  |  | 40,206 |  |  | (225) |
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 76,441 |  |  | (2,533) |  |  | 16,750 |  |  | (3,351) |  |  | 93,191 |  |  | (5,884) |
Non-agency residential mortgage-backed securities |  | 80,492 |  |  | (10,340) |  |  | — |  |  | — |  |  | 80,492 |  |  | (10,340) |
Collateralized loan obligations |  | 235,936 |  |  | (7,492) |  |  | 240,667 |  |  | (8,108) |  |  | 476,603 |  |  | (15,600) |
Corporate debt securities |  | 159,492 |  |  | (8,374) |  |  | 4,180 |  |  | (821) |  |  | 163,672 |  |  | (9,195) |
Total securities available-for-sale |  | $ | 594,827 |  |  | $ | (28,967) |  |  | $ | 270,524 |  |  | $ | (12,331) |  |  | $ | 865,351 |  |  | $ | (41,298) |
The following table presents the fair value and weighted average yields using amortized cost of the AFS securities portfolio as of September 30, 2023, based on the earlier of contractual maturity dates or next repricing dates:
|  | One year or less |  | More than One Year through Five Years |  | More than Five Years through Ten Years |  | More than Ten Years |  | Total
($ in thousands) |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield |  | Fair Value |  | Weighted-Average Yield
Securities available-for-sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SBA loan pool securities |  | $ | 8,699 |  |  | 5.79 | % |  | $ | — |  |  | — | % |  | $ | — |  |  | — | % |  | $ | — |  |  | — | % |  | $ | 8,699 |  |  | 5.79 | %
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 76,844 |  |  | 5.52 | % |  | 76,844 |  |  | 5.52 | %
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | 5,066 |  |  | 5.98 | % |  | 7,528 |  |  | 3.72 | % |  | 23,087 |  |  | 3.25 | % |  | 50,151 |  |  | 5.21 | % |  | 85,832 |  |  | 4.52 | %
Non-agency residential mortgage-backed securities |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 104,960 |  |  | 4.02 | % |  | 104,960 |  |  | 4.02 | %
Collateralized loan obligations |  | 483,804 |  |  | 7.20 | % |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 483,804 |  |  | 7.20 | %
Corporate debt securities |  | — |  |  | — | % |  | 143,052 |  |  | 4.82 | % |  | 11,863 |  |  | 5.73 | % |  | — |  |  | — | % |  | 154,915 |  |  | 4.89 | %
Total securities available-for-sale |  | $ | 497,569 |  |  | 7.16 | % |  | $ | 150,580 |  |  | 4.76 | % |  | $ | 34,950 |  |  | 4.04 | % |  | $ | 231,955 |  |  | 4.74 | % |  | $ | 915,054 |  |  | 5.97 | %
Schedule of Investments Classified by Contractual Maturity Date | The following table presents the amortized cost and fair value of the investment securities portfolio as of September 30, 2023, based on the earlier of contractual maturity dates or next repricing date:
|  | Held-to-Maturity |  | Available-for-Sale
($ in thousands) |  | Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Earlier of maturity or next repricing date: |  |  |  |  |  |  |  |
Within one year |  | $ | — |  |  | $ | — |  |  | $ | 503,799 |  |  | $ | 497,569 |
One to five years |  | — |  |  | — |  |  | 171,294 |  |  | 150,580 |
Five to ten years |  | 37,305 |  |  | 30,544 |  |  | 41,786 |  |  | 34,950 |
Greater than ten years |  | 290,982 |  |  | 219,741 |  |  | 251,130 |  |  | 231,955 |
Total |  | $ | 328,287 |  |  | $ | 250,285 |  |  | $ | 968,009 |  |  | $ | 915,054 |
Schedule of Fair Value and Weighted Average Yields of Securities Held-to-Maturity | The following table presents the amortized cost and weighted average yields using amortized cost of the HTM securities portfolio as of September 30, 2023, based on the earlier of contractual maturity dates or next repricing dates:
|  | One year or less |  | More than One Year through Five Years |  | More than Five Years through Ten Years |  | More than Ten Years |  | Total
($ in thousands) |  | Amortized Cost |  | Weighted-Average Yield |  | Amortized Cost |  | Weighted-Average Yield |  | Amortized Cost |  | Weighted-Average Yield |  | Amortized Cost |  | Weighted-Average Yield |  | Amortized Cost |  | Weighted-Average Yield
Securities held-to-maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agency and U.S. government sponsored enterprise residential mortgage-backed securities |  | $ | — |  |  | — | % |  | $ | — |  |  | — | % |  | $ | 9,334 |  |  | 2.52 | % |  | $ | 143,414 |  |  | 2.70 | % |  | $ | 152,748 |  |  | 2.69 | %
U.S. government agency and U.S. government sponsored enterprise collateralized mortgage obligations |  | — |  |  | — | % |  | — |  |  | — | % |  | — |  |  | — | % |  | 61,337 |  |  | 2.64 | % |  | 61,337 |  |  | 2.64 | %
Municipal securities |  | — |  |  | — | % |  | — |  |  | — | % |  | 27,971 |  |  | 2.32 | % |  | 86,231 |  |  | 2.72 | % |  | 114,202 |  |  | 2.62 | %
Total securities held-to-maturity |  | $ | — |  |  | — | % |  | $ | — |  |  | — | % |  | $ | 37,305 |  |  | 2.37 | % |  | $ | 290,982 |  |  | 2.69 | % |  | $ | 328,287 |  |  | 2.65 | %

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