Liability For Future Policy Benefits (Revenue and Interest Expense) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Benefit Reserves
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	$ 1,382,995	$ 1,384,137
Interest expense	292,167	285,542
Benefit Reserves | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,352,988	1,351,460
Interest expense	285,415	279,242
Benefit Reserves | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Benefit Reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	30,007	32,677
Interest expense	6,752	6,300
Deferred profit liability
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	505	423
Deferred profit liability | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	0	0
Deferred profit liability | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	0	0
Deferred profit liability | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	505	423
Additional insurance reserves
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,349,352	1,168,206
Interest expense	397,904	360,309
Additional insurance reserves | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Additional insurance reserves | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,349,352	1,168,206
Interest expense	397,904	360,309
Additional insurance reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Deferred Profit Liability Netting
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	(5,161)	3,325
Deferred Profit Liability Netting | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Deferred Profit Liability Netting | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Deferred Profit Liability Netting | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	(5,161)	3,325
Revenues
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	2,727,186	2,555,668
Revenues | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,352,988	1,351,460
Revenues | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,349,352	1,168,206
Revenues | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	24,846	36,002
Interest Expense
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	690,576	646,274
Interest Expense | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	285,415	279,242
Interest Expense | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	397,904	360,309
Interest Expense | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	$ 7,257	$ 6,723