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Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
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. 2018-1294,443 (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) benefit108,385 (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) benefit309,046 (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 taxes390,558 (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)