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Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2023
Other Comprehensive Income (Loss), Tax [Abstract] |
Change In Accumulated Other Comprehensive Income By Component, Net Of Noncontrolling Interests | The following table presents the change in accumulated other comprehensive income (loss) by component, net of noncontrolling interests.
(dollars in thousands) | Net unrealized gains (losses) on available-for-sale investments |  | Life and annuity discount rate assumption |  | Foreign currency |  | Net actuarial pension loss |  | Accumulated other comprehensive income (loss)
December 31, 2020 | $ | 698,810 |  |  | $ | — |  |  | $ | (56,420) |  |  | $ | (58,014) |  |  | $ | 584,376 |
Cumulative effect of adoption of ASU No. 2018-12 | 94,443 |  |  | (109,702) |  |  | — |  |  | — |  |  | (15,259) |
January 1, 2021 | 793,253 |  |  | (109,702) |  |  | (56,420) |  |  | (58,014) |  |  | 569,117 |
Total other comprehensive income (loss) before income taxes | (513,084) |  |  | 62,546 |  |  | (2,091) |  |  | 10,663 |  |  | (441,966) |
Income tax (expense) benefit | 108,385 |  |  | (13,135) |  |  | 1,880 |  |  | (2,273) |  |  | 94,857 |
Total other comprehensive income (loss) | (404,699) |  |  | 49,411 |  |  | (211) |  |  | 8,390 |  |  | (347,109) |
December 31, 2021 | $ | 388,554 |  |  | $ | (60,291) |  |  | $ | (56,631) |  |  | $ | (49,624) |  |  | $ | 222,008 |
Total other comprehensive income (loss) before income taxes | (1,463,876) |  |  | 189,714 |  |  | (9,677) |  |  | 31,222 |  |  | (1,252,617) |
Income tax (expense) benefit | 309,046 |  |  | (39,840) |  |  | 401 |  |  | (6,492) |  |  | 263,115 |
Total other comprehensive income (loss) | (1,154,830) |  |  | 149,874 |  |  | (9,276) |  |  | 24,730 |  |  | (989,502) |
December 31, 2022 | $ | (766,276) |  |  | $ | 89,583 |  |  | $ | (65,907) |  |  | $ | (24,894) |  |  | $ | (767,494) |
Total other comprehensive income (loss) before income taxes | 390,558 |  |  | (28,281) |  |  | 4,650 |  |  | 94 |  |  | 367,021 |
Income tax (expense) benefit | (83,655) |  |  | 5,938 |  |  | — |  |  | (20) |  |  | (77,737) |
Total other comprehensive income (loss) | 306,903 |  |  | (22,343) |  |  | 4,650 |  |  | 74 |  |  | 289,284 |
December 31, 2023 | $ | (459,373) |  |  | $ | 67,240 |  |  | $ | (61,257) |  |  | $ | (24,820) |  |  | $ | (478,210) |

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