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Supplemental Financial Statement Data (Schedule of Other Operating Cost and Expense, by Component) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other Income and Expenses [Abstract] |  |  |
Amortization of deferred policy acquisition costs | $ 1,038,975 | $ 1,038,903 | $ 961,628
Insurance operating expenses | 1,915,711 | 1,635,000 | 1,345,099
Insurance service expenses | 91,714 | 96,419 | 86,003
Net foreign currency losses (gains) | 31,799 | (50,930) | (25,725)
Debt extinguishment costs | 0 | 0 | 11,521
Other costs and expenses | 285,737 | 242,113 | 220,744
Total | $ 3,363,936 | $ 2,961,505 | $ 2,599,270

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