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INVESTMENTS (Tables) | 3 Months Ended
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Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of Cost or Amortized Cost and Fair Value of Securities Available for Sale | The following table provides the amortized cost and fair value of available-for-sale debt securities as of the dates presented (in thousands):
| March 31, 2025
| Amortized Cost |  | Allowance for Expected Credit Losses |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Debt Securities: |  |  |  |  |  |  |  |  |
U.S. government obligations and agencies | $ | 21,762 |  |  | $ | — |  |  | $ | 125 |  |  | $ | (396) |  |  | $ | 21,491 |
Corporate bonds | 943,716 |  |  | (711) |  |  | 2,620 |  |  | (43,842) |  |  | 901,783 |
Mortgage-backed and asset-backed securities | 401,745 |  |  | — |  |  | 1,676 |  |  | (25,899) |  |  | 377,522 |
Municipal bonds | 15,870 |  |  | (1) |  |  | — |  |  | (1,291) |  |  | 14,578 |
Redeemable preferred stock | 9,480 |  |  | (117) |  |  | 29 |  |  | (428) |  |  | 8,964 |
Total | $ | 1,392,573 |  |  | $ | (829) |  |  | $ | 4,450 |  |  | $ | (71,856) |  |  | $ | 1,324,338 |
| December 31, 2024
| Amortized Cost |  | Allowance for Expected Credit Losses |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Debt Securities: |  |  |  |  |  |  |  |  |
U.S. government obligations and agencies | $ | 20,284 |  |  | $ | — |  |  | $ | 35 |  |  | $ | (572) |  |  | $ | 19,747 |
Corporate bonds | 920,337 |  |  | (894) |  |  | 1,580 |  |  | (52,075) |  |  | 868,948 |
Mortgage-backed and asset-backed securities | 387,538 |  |  | — |  |  | 1,041 |  |  | (31,549) |  |  | 357,030 |
Municipal bonds | 15,893 |  |  | (3) |  |  | — |  |  | (1,536) |  |  | 14,354 |
Redeemable preferred stock | 9,480 |  |  | (121) |  |  | 23 |  |  | (382) |  |  | 9,000 |
Total | $ | 1,353,532 |  |  | $ | (1,018) |  |  | $ | 2,679 |  |  | $ | (86,114) |  |  | $ | 1,269,079 |
Schedule of Credit Quality of Investment Securities | The following table provides the credit quality of available-for-sale debt securities with contractual maturities as of the dates presented (dollars in thousands):
|  | March 31, 2025 |  | December 31, 2024
Average Credit Ratings |  | Fair Value |  | % of Total Fair Value |  | Fair Value |  | % of Total Fair Value
AAA |  | $ | 403,447 |  |  | 30.4 | % |  | $ | 378,732 |  |  | 29.9 | %
AA |  | 145,768 |  |  | 11.0 | % |  | 146,456 |  |  | 11.5 | %
A |  | 441,890 |  |  | 33.4 | % |  | 425,503 |  |  | 33.5 | %
BBB |  | 328,126 |  |  | 24.8 | % |  | 313,265 |  |  | 24.7 | %
No Rating Available |  | 5,107 |  |  | 0.4 | % |  | 5,123 |  |  | 0.4 | %
Total |  | $ | 1,324,338 |  |  | 100.0 | % |  | $ | 1,269,079 |  |  | 100.0 | %
Schedule of Amortized Cost and Fair Value on Mortgage-Backed and Asset-Backed Securities | The following table summarizes the amortized cost and fair value of mortgage-backed and asset-backed securities as of the dates presented (in thousands):
| March 31, 2025 |  | December 31, 2024
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
Mortgage-backed securities: |  |  |  |  |  |  |
Agency | $ | 201,962 |  |  | $ | 183,942 |  |  | $ | 194,400 |  |  | $ | 171,531 |
Non-agency | 65,451 |  |  | 59,567 |  |  | 58,722 |  |  | 51,940 |
Asset-backed securities: |  |  |  |  |  |  |
Auto loan receivables | 61,928 |  |  | 62,283 |  |  | 60,087 |  |  | 60,326 |
Credit card receivables | 10,432 |  |  | 10,491 |  |  | 9,702 |  |  | 9,769 |
Other receivables | 61,972 |  |  | 61,239 |  |  | 64,627 |  |  | 63,464 |
Total | $ | 401,745 |  |  | $ | 377,522 |  |  | $ | 387,538 |  |  | $ | 357,030 |
Schedule of Fair Value and Gross Unrealized Losses on Securities Available for Sale | The following tables summarize available-for-sale debt securities, aggregated by major security type and the length of time that individual securities have been in a continuous unrealized loss position, for which no allowance for expected credit losses has been recorded as of the dates presented (in thousands):
|  | March 31, 2025
|  | Less Than 12 Months |  |  | 12 Months or Longer
|  |  | Fair Value |  | Unrealized Losses |  |  |  | Fair Value |  | Unrealized Losses
Debt Securities: |  |  |  |  |  |  |  |  |  |  |
U.S. government obligations and agencies |  |  | $ | — |  |  | $ | — |  |  |  |  | $ | 2,786 |  |  | $ | (321) |
Corporate bonds |  |  | 2,253 |  |  | (7) |  |  |  |  | 277,587 |  |  | (21,672) |
Mortgage-backed and asset-backed securities |  |  | 8,262 |  |  | (12) |  |  |  |  | 183,464 |  |  | (26,244) |
Municipal bonds |  |  | — |  |  | — |  |  |  |  | 10,183 |  |  | (945) |
Redeemable preferred stock |  |  | — |  |  | — |  |  |  |  | 826 |  |  | (83) |
Total |  |  | $ | 10,515 |  |  | $ | (19) |  |  |  |  | $ | 474,846 |  |  | $ | (49,265) |
|  | December 31, 2024
|  | Less Than 12 Months |  |  | 12 Months or Longer
|  |  | Fair Value |  | Unrealized Losses |  |  |  | Fair Value |  | Unrealized Losses
Debt Securities: |  |  |  |  |  |  |  |  |  |  |
U.S. government obligations and agencies |  |  | $ | 12,962 |  |  | $ | (193) |  |  |  |  | $ | 2,727 |  |  | $ | (379) |
Corporate bonds |  |  | 44,049 |  |  | (1,780) |  |  |  |  | 283,877 |  |  | (25,336) |
Mortgage-backed and asset-backed securities |  |  | 64,516 |  |  | (1,567) |  |  |  |  | 179,865 |  |  | (29,935) |
Municipal bonds |  |  | 1,244 |  |  | (53) |  |  |  |  | 9,624 |  |  | (1,099) |
Redeemable preferred stock |  |  | — |  |  | — |  |  |  |  | 825 |  |  | (84) |
Total |  |  | $ | 122,771 |  |  | $ | (3,593) |  |  |  |  | $ | 476,918 |  |  | $ | (56,833) |
Schedule of Debt Securities, Available-for-sale, Allowance for Credit Loss | The table of expected credit losses below presents the beginning and ending balances, along with the provision for or reversal of credit loss expenses, categorized by security type. This information pertains to available-for-sale debt securities that are in an unrealized loss position, necessitating a credit allowance (in thousands):
|  | Corporate Bonds |  |  |  | Municipal Bonds |  | Redeemable Preferred Stock |  | Total
Balance, December 31, 2023 |  | $ | 469 |  |  |  |  | $ | 4 |  |  | $ | 93 |  |  | $ | 566 |
Provision for (or reversal of) credit loss expense |  | 425 |  |  |  |  | (1) |  |  | 28 |  |  | 452 |
Balance, December 31, 2024 |  | 894 |  |  |  |  | 3 |  |  | 121 |  |  | 1,018 |
Provision for (or reversal of) credit loss expense |  | (183) |  |  |  |  | (2) |  |  | (4) |  |  | (189) |
Balance, March 31, 2025 |  | $ | 711 |  |  |  |  | $ | 1 |  |  | $ | 117 |  |  | $ | 829 |
Schedule of Amortized Cost and Fair Value of Investments With Contractual Maturities | The following table presents the amortized cost and fair value of investments with maturities as of the date presented (in thousands):
| March 31, 2025
| Amortized Cost |  | Fair Value
Due in one year or less | $ | 198,513 |  |  | $ | 196,170 |
Due after one year through five years | 703,944 |  |  | 682,232 |
Due after five years through ten years | 462,984 |  |  | 422,970 |
Due after ten years | 24,030 |  |  | 19,974 |
Perpetual maturity securities | 3,102 |  |  | 2,992 |
Total | $ | 1,392,573 |  |  | $ | 1,324,338 |
Schedule of Securities Available for Sale | The following table provides certain information related to available-for-sale debt securities and equity securities during the periods presented (in thousands):
| Three Months Ended March 31, |  |
| 2025 |  | 2024 |  |  |  |
Proceeds from sales and maturities (fair value): |  |  |  |  |  |  |
Available-for-sale debt securities | $ | 36,685 |  |  | $ | 36,548 |  |  |  |  |
Equity securities | $ | — |  |  | $ | 2,910 |  |  |  |  |
Gross realized gains on sale of securities: |  |  |  |  |  |  |
Available-for-sale debt securities | $ | 24 |  |  | $ | 5 |  |  |  |  |
Equity securities | $ | — |  |  | $ | 69 |  |  |  |  |
Gross realized losses on sale of securities: |  |  |  |  |  |  |
Available-for-sale debt securities | $ | (38) |  |  | $ | (74) |  |  |  |  |
Equity securities | $ | — |  |  | $ | (77) |  |  |  |  |
Schedule of Investment Income (Expense) Comprised Primarily of Interest and Dividends | The following table presents the components of net investment income, comprised primarily of interest and dividends, for the periods presented (in thousands):
| Three Months Ended March 31, |  |
| 2025 |  | 2024 |  |  |  |
Available-for-sale debt securities | $ | 10,719 |  |  | $ | 7,214 |  |  |  |  |
Equity securities | 796 |  |  | 894 |  |  |  |  |
Cash and cash equivalents (1) | 5,122 |  |  | 5,823 |  |  |  |  |
Other (2) | 166 |  |  | 177 |  |  |  |  |
Total investment income | 16,803 |  |  | 14,108 |  |  |  |  |
Less: Investment expenses (3) | (743) |  |  | (585) |  |  |  |  |
Net investment income | $ | 16,060 |  |  | $ | 13,523 |  |  |  |  |
(1) |  |  | Includes interest earned on restricted cash and cash equivalents.
(2) |  |  | Includes investment income earned on real estate investments.
(3) |  |  | Includes custodial fees, investment accounting and advisory fees, and expenses associated with real estate investments.
Schedule of Details on Unrealized Gains and Losses Related to Equity Securities | The following table provides the unrealized gains and (losses) recognized for the periods presented on equity securities still held at the end of the reported period (in thousands):
| Three Months Ended March 31, |  |
| 2025 |  | 2024 |  |  |  |
Unrealized gains (losses) recognized during the reported period on equity securities still held at the end of the reported period | $ | 225 |  |  | $ | 2,905 |  |  |  |  |
The following table provides the unrealized gains recognized for the periods presented on investment in private equity limited partnerships still held at the end of the reported period (in thousands):
|  | Three Months Ended March 31, |  | Three Months Ended March 31,
|  | 2025 |  | 2024 |  |
Unrealized gains (losses) recognized during the reported period on investments in private equity limited partnerships reported at fair value still held at the end of reported period |  | $ | (452) |  |  | $ | — |  |  |
Unrealized gains (losses) recognized during the reported period on investments in private equity limited partnerships reported at net asset value still held at the end of reported period |  | $ | 11 |  |  | $ | — |  |  |
Total unrealized gains (losses) recognized during the reported period on investments in private equity limited partnerships still held at the end of the reported period |  | $ | (441) |  |  | $ | — |  |  |
Schedule of Real Estate Investment | Investment in real estate consisted of the following as of the dates presented (in thousands):
| March 31, |  | December 31,
| 2025 |  | 2024
Income Producing: |  |  |
Investment in real estate | $ | 10,108 |  |  | $ | 10,102 |
Less: Accumulated depreciation | (1,855) |  |  | (1,780) |
Investment in real estate, net | $ | 8,253 |  |  | $ | 8,322 |
Schedule of Depreciation Expense Related to Investment Real Estate | The following table provides the depreciation expense related to investment in real estate for the periods presented (in thousands):
| Three Months Ended March 31, |  |
| 2025 |  | 2024 |  |  |  |
Depreciation expense on investment in real estate | $ | 75 |  |  | $ | 46 |  |  |  |  |
Schedule of Fair Value of the Other Investments Reported at Net Asset Value | The fair value of the other investments reported at net asset value consisted of the following as of the date presented (in thousands):
|  | As of March 31, 2025
|  | Fair Value |  | Unfunded Commitments |  | Redemption Frequency (if Currently Eligible) | Redemption Notice Period
Investments in private equity limited partnerships - Net Asset Value (a) |  | $ | 3,932 |  |  | $ | — |  |  | N/A | N/A
Total |  | $ | 3,932 |  |  | $ | — |  |  |  |
(a)This class includes private equity funds that invest in cybersecurity companies which are subject to a contractual restriction on the transfer or sale by the Company prior to liquidation or dissolution of the partnership agreement by the general partner. Distributions are received through liquidation of the underlying assets of the fund. The fair value of these assets has been estimated using the net asset value (NAV) per share of investments. It is estimated that these investments will be liquidated over four to nine years.
|  | As of December 31, 2024
|  | Fair Value |  | Unfunded Commitments |  | Redemption Frequency (if Currently Eligible) | Redemption Notice Period
Investments in private equity limited partnerships - Net Asset Value (a) |  | $ | 3,921 |  |  | $ | — |  |  | N/A | N/A
Total |  | $ | 3,921 |  |  | $ | — |  |  |  |
(a)This class includes private equity funds that invest in cybersecurity companies which are subject to a contractual restriction on the transfer or sale by the Company prior to liquidation or dissolution of the partnership agreement by the general partner. Distributions are received through liquidation of the underlying assets of the fund. The fair value of these assets has been estimated using the net asset value (NAV) per share of investments. It is estimated that these investments will be liquidated over four to nine years.
Schedule of Other Investments | Other investments consisted of the following as of the dates presented (in thousands):
|  | March 31, |  | December 31,
|  | 2025 |  | 2024
Investments in private equity limited partnerships reported at fair value |  | $ | 11,750 |  |  | $ | 12,202 |
Investments in private equity limited partnerships reported at net asset value |  | 3,932 |  |  | 3,921 |
Total Investments in private equity partnerships |  | $ | 15,682 |  |  | $ | 16,123 |

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