Supplemental Financial Statement Data (Schedule of Other Operating Cost and Expense, by Component) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Income and Expenses [Abstract]
Amortization of deferred policy acquisition costs	$ 1,219,849	$ 1,038,975	$ 1,038,903
Insurance operating expenses	2,075,053	1,915,711	1,635,000
Insurance service expenses	90,640	91,714	96,419
Net foreign currency (gains) losses	(52,376)	31,799	(50,930)
Other costs and expenses	269,140	285,737	242,113
Total	$ 3,602,306	$ 3,363,936	$ 2,961,505