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v3.24.3

Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 6,161,970 | $ 6,061,022
Gross Unrealized Gains | 62,139 | 28,235
Gross Unrealized Losses | (260,044) | (366,144)
Fair Value | 5,964,065 | 5,723,113
Assets held by insurance regulatory requirements | 12,500 | 12,200
Assets held in trust for the benefit of contractual counterparties | 198,400 | 156,900
U.S. Treasury securities and obligations of U.S. government corporations and agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 257,572 | 167,995
Gross Unrealized Gains | 741 | 51
Gross Unrealized Losses | (4,019) | (6,364)
Fair Value | 254,294 | 161,682
Obligations of U.S. states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,066,711 | 2,092,754
Gross Unrealized Gains | 7,881 | 5,159
Gross Unrealized Losses | (144,890) | (189,835)
Fair Value | 1,929,702 | 1,908,078
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,774,109 | 2,626,401
Gross Unrealized Gains | 40,041 | 17,391
Gross Unrealized Losses | (84,005) | (128,211)
Fair Value | 2,730,145 | 2,515,581
ABS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 156,008 | 173,256
Gross Unrealized Gains | 3,339 | 1,292
Gross Unrealized Losses | (1,397) | (3,275)
Fair Value | 157,950 | 171,273
RMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 379,184 | 347,132
Gross Unrealized Gains | 9,467 | 4,297
Gross Unrealized Losses | (18,216) | (20,656)
Fair Value | 370,435 | 330,773
CMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 270,014 | 293,204
Gross Unrealized Gains | 449 | 5
Gross Unrealized Losses | (6,927) | (15,752)
Fair Value | 263,536 | 277,457
CLOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 236,816 | 327,467
Gross Unrealized Gains | 221 | 37
Gross Unrealized Losses | (53) | (1,408)
Fair Value | 236,984 | 326,096
Foreign government debt |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 4,487 | 4,486
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (537) | (643)
Fair Value | 3,950 | 3,843
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 17,069 | 28,327
Gross Unrealized Gains | 0 | 3
Gross Unrealized Losses | 0 | 0
Fair Value | $ 17,069 | $ 28,330

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