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Investments (Tables) | 6 Months Ended
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Jun. 30, 2025
Gross Unrecognized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses, Carrying Amount and Fair Value of Investments Classified as Held-to-Maturity | The amortized cost, allowance for credit losses, carrying amount, gross unrecognized gains and losses, and the fair value of those investments classified as held-to-maturity at June 30, 2025 are summarized as follows:
|  | Amortized Cost |  |  | Allowance for Credit Losses |  |  | Carrying Amount |  |  | Gross Unrecognized Gains |  |  | Gross Unrecognized Losses |  |  | Fair Value |
|  | (in thousands) |
States and political subdivisions |  | $ | 351,907 |  |  | $ | (27 | ) |  | $ | 351,880 |  |  | $ | 593 |  |  | $ | (13,102 | ) |  | $ | 339,371 |
Corporate bonds |  |  | 21,899 |  |  |  | (61 | ) |  |  | 21,838 |  |  |  | 6 |  |  |  | (697 | ) |  |  | 21,147 |
U.S. agency-based mortgage-backed securities |  |  | 2,573 |  |  |  | — |  |  |  | 2,573 |  |  |  | 21 |  |  |  | (114 | ) |  |  | 2,480 |
U.S. Treasury securities and obligations of U.S. government agencies |  |  | 8,522 |  |  |  | — |  |  |  | 8,522 |  |  |  | 9 |  |  |  | (183 | ) |  |  | 8,348 |
Asset-backed securities |  |  | 9 |  |  |  | — |  |  |  | 9 |  |  |  | — |  |  |  | — |  |  |  | 9 |
Totals |  | $ | 384,910 |  |  | $ | (88 | ) |  | $ | 384,822 |  |  | $ | 629 |  |  | $ | (14,096 | ) |  | $ | 371,355 |
The amortized cost, allowance for credit losses, carrying amount, gross unrecognized gains and losses, and the fair value of those investments classified as held-to-maturity at December 31, 2024 are summarized as follows:
|  | Amortized Cost |  |  | Allowance for Credit Losses |  |  | Carrying Amount |  |  | Gross Unrecognized Gains |  |  | Gross Unrecognized Losses |  |  | Fair Value |
|  | (in thousands) |
States and political subdivisions |  | $ | 368,056 |  |  | $ | (30 | ) |  | $ | 368,026 |  |  | $ | 1,810 |  |  | $ | (13,568 | ) |  | $ | 356,268 |
Corporate bonds |  |  | 33,849 |  |  |  | (86 | ) |  |  | 33,763 |  |  |  | 6 |  |  |  | (1,099 | ) |  |  | 32,670 |
U.S. agency-based mortgage-backed securities |  |  | 2,781 |  |  |  | — |  |  |  | 2,781 |  |  |  | 11 |  |  |  | (149 | ) |  |  | 2,643 |
U.S. Treasury securities and obligations of U.S. government agencies |  |  | 8,478 |  |  |  | — |  |  |  | 8,478 |  |  |  | 11 |  |  |  | (362 | ) |  |  | 8,127 |
Asset-backed securities |  |  | 13 |  |  |  | — |  |  |  | 13 |  |  |  | — |  |  |  | — |  |  |  | 13 |
Totals |  | $ | 413,177 |  |  | $ | (116 | ) |  | $ | 413,061 |  |  | $ | 1,838 |  |  | $ | (15,178 | ) |  | $ | 399,721 |
Gross Unrealized Gains and Losses and Cost or Amortized Cost, Allowance for Credit Losses and Fair Value of Investments Classified as Available-for-sale | The amortized cost, gross unrealized gains and losses, fair value, and the allowance for credit losses of those investments classified as available-for-sale at June 30, 2025 are summarized as follows:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Allowance for Credit Losses |
|  | (in thousands) |
States and political subdivisions |  | $ | 165,127 |  |  | $ | 164 |  |  | $ | (9,592 | ) |  | $ | 155,699 |  |  | $ | — |
Corporate bonds |  |  | 131,993 |  |  |  | 2,136 |  |  |  | (1,276 | ) |  |  | 132,853 |  |  |  | — |
U.S. agency-based mortgage-backed securities |  |  | 4,265 |  |  |  | — |  |  |  | (377 | ) |  |  | 3,888 |  |  |  | — |
U.S. Treasury securities and obligations of U.S. government agencies |  |  | 14,901 |  |  |  | — |  |  |  | (626 | ) |  |  | 14,275 |  |  |  | — |
Totals |  | $ | 316,286 |  |  | $ | 2,300 |  |  | $ | (11,871 | ) |  | $ | 306,715 |  |  | $ | — |
The amortized cost, gross unrealized gains and losses, fair value, and the allowance for credit losses of those investments classified as available-for-sale at December 31, 2024 are summarized as follows:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Allowance for Credit Losses |
|  | (in thousands) |
States and political subdivisions |  | $ | 156,488 |  |  | $ | 148 |  |  | $ | (8,430 | ) |  | $ | 148,206 |  |  | $ | — |
Corporate bonds |  |  | 143,070 |  |  |  | 1,248 |  |  |  | (2,783 | ) |  |  | 141,535 |  |  |  | — |
U.S. agency-based mortgage-backed securities |  |  | 4,545 |  |  |  | — |  |  |  | (486 | ) |  |  | 4,059 |  |  |  | — |
U.S. Treasury securities and obligations of U.S. government agencies |  |  | 14,872 |  |  |  | — |  |  |  | (922 | ) |  |  | 13,950 |  |  |  | — |
Totals |  | $ | 318,975 |  |  | $ | 1,396 |  |  | $ | (12,621 | ) |  | $ | 307,750 |  |  | $ | — |
Gross Unrealized Gains and Losses and Cost of Equity | The cost, gross unrealized gains and losses, and the fair value of equity securities at June 30, 2025 are summarized as follows:
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |
Domestic common stock - Exchange Traded Funds |  | $ | 31,164 |  |  | $ | 21,287 |  |  | $ | — |  |  | $ | 52,451 |
Total equity securities |  | $ | 31,164 |  |  | $ | 21,287 |  |  | $ | — |  |  | $ | 52,451 |
The cost, gross unrealized gains and losses, and the fair value of equity securities at December 31, 2024 are summarized as follows:
|  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |
Domestic common stock - Exchange Traded Funds |  | $ | 36,020 |  |  | $ | 22,609 |  |  | $ | — |  |  | $ | 58,629 |
Total equity securities |  | $ | 36,020 |  |  | $ | 22,609 |  |  | $ | — |  |  | $ | 58,629 |
Investment Securities Continuous Unrealized Loss Position | The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of June 30, 2025.
|  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair Value of Investments with Unrealized Losses |  |  | Gross Unrealized Losses |  |  | Fair Value of Investments with Unrealized Losses |  |  | Gross Unrealized Losses |  |  | Fair Value of Investments with Unrealized Losses |  |  | Gross Unrealized Losses |
|  | (in thousands) |
June 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions |  | $ | 74,676 |  |  | $ | 3,173 |  |  | $ | 70,884 |  |  | $ | 6,419 |  |  | $ | 145,560 |  |  | $ | 9,592 |
Corporate bonds |  |  | 13,152 |  |  |  | 120 |  |  |  | 37,848 |  |  |  | 1,156 |  |  |  | 51,000 |  |  |  | 1,276 |
U.S. agency-based mortgage-backed securities |  |  | — |  |  |  | — |  |  |  | 3,888 |  |  |  | 377 |  |  |  | 3,888 |  |  |  | 377 |
U.S. Treasury securities and obligations of U.S. government agencies |  |  | — |  |  |  | — |  |  |  | 14,275 |  |  |  | 626 |  |  |  | 14,275 |  |  |  | 626 |
Total available-for-sale securities |  | $ | 87,828 |  |  | $ | 3,293 |  |  | $ | 126,895 |  |  | $ | 8,578 |  |  | $ | 214,723 |  |  | $ | 11,871 |
The following table summarizes the fair value and gross unrealized losses on securities classified as available-for-sale, aggregated by major investment category and length of time that the individual securities have been in a continuous unrealized loss position as of December 31, 2024.
|  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair Value of Investments with Unrealized Losses |  |  | Gross Unrealized Losses |  |  | Fair Value of Investments with Unrealized Losses |  |  | Gross Unrealized Losses |  |  | Fair Value of Investments with Unrealized Losses |  |  | Gross Unrealized Losses |
|  | (in thousands) |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
States and political subdivisions |  | $ | 100,190 |  |  | $ | 5,748 |  |  | $ | 27,446 |  |  | $ | 2,682 |  |  | $ | 127,636 |  |  | $ | 8,430 |
Corporate bonds |  |  | 71,069 |  |  |  | 1,790 |  |  |  | 19,000 |  |  |  | 993 |  |  |  | 90,069 |  |  |  | 2,783 |
U.S. agency-based mortgage-backed securities |  |  | 3,840 |  |  |  | 446 |  |  |  | 219 |  |  |  | 40 |  |  |  | 4,059 |  |  |  | 486 |
U.S. Treasury securities and obligations of U.S. government agencies |  |  | — |  |  |  | — |  |  |  | 13,950 |  |  |  | 922 |  |  |  | 13,950 |  |  |  | 922 |
Total available-for-sale securities |  | $ | 175,099 |  |  | $ | 7,984 |  |  | $ | 60,615 |  |  | $ | 4,637 |  |  | $ | 235,714 |  |  | $ | 12,621 |
Changes in Allowance for Credit Losses by Major Security Type of Investments Classified as Held-to-Maturity | The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the quarter ended June 30, 2025.
|  | States and Political Subdivisions |  |  | Corporate Bonds |  |  | U.S. Agency -Based Mortgage- Backed Securities |  |  | U.S. Treasury Securities and Obligations of U.S. Government Agencies |  |  | Asset-Backed Securities |  |  | Totals |
|  | (in thousands) |
Balance at March 31, 2025 |  | $ | 29 |  |  | $ | 71 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 100 |
Provision for credit loss benefit |  |  | (2 | ) |  |  | (10 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (12 | )
Balance at June 30, 2025 |  | $ | 27 |  |  | $ | 61 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 88 |
The following table illustrates the changes in the allowance for credit losses by major security type of the investments classified as held-to-maturity for the six months ended June 30, 2025.
|  | States and Political Subdivisions |  |  | Corporate Bonds |  |  | U.S. Agency -Based Mortgage- Backed Securities |  |  | U.S. Treasury Securities and Obligations of U.S. Government Agencies |  |  | Asset-Backed Securities |  |  | Totals |
|  | (in thousands) |
Balance at December 31, 2024 |  | $ | 30 |  |  | $ | 86 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 116 |
Provision for credit loss benefit |  |  | (3 | ) |  |  | (25 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (28 | )
Balance at June 30, 2025 |  | $ | 27 |  |  | $ | 61 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 88 |
Schedule of Amortized Cost Held-to-Maturity Securities Aggregated By Credit Quality Indicator | The table below presents the amortized cost of held-to-maturity securities aggregated by credit quality indicator as of June 30, 2025.
|  | States and Political Subdivisions |  |  | Corporate Bonds |  |  | U.S. Agency -Based Mortgage- Backed Securities |  |  | U.S. Treasury Securities and Obligations of U.S. Government Agencies |  |  | Asset-Backed Securities |  |  | Totals |
|  | Amortized Cost |
|  | (in thousands) |
AAA/AA/A ratings |  | $ | 351,252 |  |  | $ | 9,987 |  |  | $ | 2,573 |  |  | $ | 8,522 |  |  | $ | — |  |  | $ | 372,334 |
Baa/BBB ratings |  |  | 655 |  |  |  | 11,912 |  |  |  | — |  |  |  | — |  |  |  | 9 |  |  |  | 12,576 |
Total |  | $ | 351,907 |  |  | $ | 21,899 |  |  | $ | 2,573 |  |  | $ | 8,522 |  |  | $ | 9 |  |  | $ | 384,910 |
Held-to-Maturity Securities [Member] |
Summary of Carrying Amount, Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity | A summary of the carrying amounts and fair value of investments in fixed maturity securities classified as held-to-maturity, by contractual maturity, is as follows:
|  | June 30, 2025 |  |  | December 31, 2024 |
|  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
|  | (in thousands) |
Maturity: |  |  |  |  |  |  |  |  |  |  |  |
Within one year |  | $ | 40,378 |  |  | $ | 40,159 |  |  | $ | 49,303 |  |  | $ | 48,831 |
After one year through five years |  |  | 83,088 |  |  |  | 80,890 |  |  |  | 93,087 |  |  |  | 89,418 |
After five years through ten years |  |  | 122,326 |  |  |  | 117,611 |  |  |  | 115,307 |  |  |  | 109,812 |
After ten years |  |  | 136,448 |  |  |  | 130,206 |  |  |  | 152,570 |  |  |  | 149,004 |
U.S. agency-based mortgage-backed securities |  |  | 2,573 |  |  |  | 2,480 |  |  |  | 2,781 |  |  |  | 2,643 |
Asset-backed securities |  |  | 9 |  |  |  | 9 |  |  |  | 13 |  |  |  | 13 |
Totals |  | $ | 384,822 |  |  | $ | 371,355 |  |  | $ | 413,061 |  |  | $ | 399,721 |
Available-for-Sale Securities [Member] |
Summary of Carrying Amount, Amortized Cost and Fair Value of Investments in Fixed Maturity Securities, by Contractual Maturity | A summary of the amortized cost and fair value of investments in fixed maturity securities classified as available-for-sale, by contractual maturity, is as follows:
|  | June 30, 2025 |  |  | December 31, 2024 |
|  | Amortized Cost |  |  | Fair Value |  |  | Amortized Cost |  |  | Fair Value |
|  | (in thousands) |
Maturity: |  |  |  |  |  |  |  |  |  |  |  |
Within one year |  | $ | 33,100 |  |  | $ | 32,828 |  |  | $ | 23,944 |  |  | $ | 23,806 |
After one year through five years |  |  | 79,530 |  |  |  | 78,719 |  |  |  | 97,996 |  |  |  | 95,500 |
After five years through ten years |  |  | 73,355 |  |  |  | 72,208 |  |  |  | 71,233 |  |  |  | 68,494 |
After ten years |  |  | 126,036 |  |  |  | 119,072 |  |  |  | 121,257 |  |  |  | 115,891 |
U.S. agency-based mortgage-backed securities |  |  | 4,265 |  |  |  | 3,888 |  |  |  | 4,545 |  |  |  | 4,059 |
Totals |  | $ | 316,286 |  |  | $ | 306,715 |  |  | $ | 318,975 |  |  | $ | 307,750 |

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