Liability For Future Policy Benefits (Future Policy Benefits) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Insurance [Abstract]
Benefit reserves, end of period, post-flooring	$ 7,650,220		$ 7,449,542
Deferred profit liability, end of period, post-flooring	24,421		20,007
Additional insurance reserves, including amounts in AOCI, end of period, post-flooring	17,208,662		14,474,129
Subtotal of amounts disclosed above	24,883,303		21,943,678
Other Future Policy Benefits reserves	1,174,169		1,086,901
Total Future policy Benefits	$ 26,057,472	$ 25,113,767	$ 23,030,579