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v3.25.2

Investments - Cost and Fair Value, Net of Credit Loss Allowance, of Fixed Maturity Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Available-for-sale securities: |  |
Amortized cost | $ 1,133,258 |
Estimated fair value | 1,126,148 |
Held-to-maturity securities: |  |
Amortized cost | 1,138,091 | $ 1,070,789
Gross unrealized gains | 13,592 | 6,907
Gross unrealized losses | 20,705 | 29,147
Estimated fair value | 1,130,978 | 1,048,549
Fair value of securities lent | 35,500 |
Corporate debt securities |  |
Available-for-sale securities: |  |
Amortized cost | 700,045 | 647,861
Gross unrealized gains | 9,919 | 4,767
Gross unrealized losses | 4,745 | 8,685
Estimated fair value | 705,219 | 643,943
Held-to-maturity securities: |  |
Fair value of securities lent |  | 7,300
Collateralized debt obligations |  |
Available-for-sale securities: |  |
Amortized cost | 108,904 | 114,142
Gross unrealized gains | 275 | 372
Gross unrealized losses | 268 | 387
Estimated fair value | 108,911 | 114,127
Commercial mortgage-backed securities |  |
Available-for-sale securities: |  |
Amortized cost | 123,616 | 126,509
Gross unrealized gains | 2,483 | 1,458
Gross unrealized losses | 1,907 | 2,985
Estimated fair value | 124,192 | 124,982
Residential mortgage-backed securities |  |
Available-for-sale securities: |  |
Amortized cost | 157,688 | 150,212
Gross unrealized gains | 362 | 62
Gross unrealized losses | 13,429 | 16,462
Estimated fair value | 144,621 | 133,812
Other debt securities |  |
Available-for-sale securities: |  |
Amortized cost | 35,756 | 27,232
Gross unrealized gains | 498 | 147
Gross unrealized losses | 327 | 628
Estimated fair value | 35,927 | 26,751
U.S. Treasury |  |
Available-for-sale securities: |  |
Amortized cost | 7,249 |
Gross unrealized gains | 55 |
Gross unrealized losses | 26 |
Estimated fair value | 7,278 |
Total available-for-sale securities |  |
Available-for-sale securities: |  |
Amortized cost | 1,133,258 | 1,065,956
Gross unrealized gains | 13,592 | 6,806
Gross unrealized losses | 20,702 | 29,147
Estimated fair value | 1,126,148 | 1,043,615
Held-to-maturity securities: |  |
Fair value of securities lent | 18,400 |
Held-to-maturity securities |  |
Held-to-maturity securities: |  |
Amortized cost | 4,833 | 4,833
Gross unrealized gains | 0 | 101
Gross unrealized losses | 3 | 0
Estimated fair value | $ 4,830 | $ 4,934

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