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v3.26.1

Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 5,897,786 | $ 5,944,001
Gross Unrealized Gains | 33,484 | 61,897
Gross Unrealized Losses | (230,212) | (214,667)
Fair Value | 5,701,058 | 5,791,231
Assets held by insurance regulatory requirements | 12,500 | 12,600
Assets held in trust for the benefit of contractual counterparties | 188,500 | 185,700
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 284,121 | 279,359
Gross Unrealized Gains | 113 | 958
Gross Unrealized Losses | (3,046) | (2,505)
Fair Value | 281,188 | 277,812
Obligations of U.S. states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,849,688 | 1,961,841
Gross Unrealized Gains | 9,958 | 10,958
Gross Unrealized Losses | (139,081) | (134,035)
Fair Value | 1,720,565 | 1,838,764
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,722,787 | 2,712,348
Gross Unrealized Gains | 16,908 | 36,781
Gross Unrealized Losses | (65,022) | (57,857)
Fair Value | 2,674,673 | 2,691,272
ABS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 290,072 | 225,478
Gross Unrealized Gains | 862 | 2,418
Gross Unrealized Losses | (2,813) | (1,335)
Fair Value | 288,121 | 226,561
RMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 373,594 | 366,671
Gross Unrealized Gains | 4,760 | 8,169
Gross Unrealized Losses | (16,758) | (16,816)
Fair Value | 361,596 | 358,024
CMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 235,738 | 237,974
Gross Unrealized Gains | 750 | 2,484
Gross Unrealized Losses | (3,008) | (1,675)
Fair Value | 233,480 | 238,783
CLOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 124,168 | 99,182
Gross Unrealized Gains | 133 | 129
Gross Unrealized Losses | (52) | (24)
Fair Value | 124,249 | 99,287
Foreign government debt |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,488 | 4,487
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (431) | (420)
Fair Value | 4,057 | 4,067
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 13,130 | 56,661
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (1) | 0
Fair Value | $ 13,129 | $ 56,661

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