Supplemental Financial Statement Data (Schedule of Other Operating Cost and Expense, by Component) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Income and Expenses [Abstract]
Amortization of deferred policy acquisition costs	$ 1,038,903	$ 961,628	$ 904,955
Insurance operating expenses	1,635,000	1,345,099	1,206,058
Insurance service expenses	96,419	86,003	85,724
Net foreign currency (gains) losses	(50,930)	(25,725)	363
Debt extinguishment costs	0	11,521	8,440
Other costs and expenses	242,113	220,744	184,852
Total	$ 2,961,505	$ 2,599,270	$ 2,390,392