Liability For Future Policy Benefits (Revenue and Interest Expense) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Benefit Reserves
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	$ 924,834	$ 944,747
Interest expense	189,725	182,222
Benefit Reserves | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Benefit Reserves | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	900,634	925,202
Interest expense	185,524	178,413
Benefit Reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	24,200	19,545
Interest expense	4,201	3,809
Additional insurance reserves
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	785,370	627,513
Interest expense	237,869	203,986
Additional insurance reserves | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	785,370	627,513
Interest expense	237,869	203,986
Additional insurance reserves | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Additional insurance reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Deferred profit liability
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	3,691	(867)
Interest expense	294	276
Deferred profit liability | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Deferred profit liability | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0
Interest expense	0	0
Deferred profit liability | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	3,691	(867)
Interest expense	294	276
Revenues
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,713,895	1,571,393
Revenues | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	785,370	627,513
Revenues | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	900,634	925,202
Revenues | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	27,891	18,678
Interest Expense
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	427,888	386,484
Interest Expense | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	237,869	203,986
Interest Expense | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	185,524	178,413
Interest Expense | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	$ 4,495	$ 4,085