Liability For Future Policy Benefits (Revenue and Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Benefit Reserves
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	$ 460,859	$ 473,913
Interest expense	94,645	87,815
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	449,968	462,094
Interest expense	92,508	85,937
Benefit Reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	10,891	11,819
Interest expense	2,137	1,878
Additional insurance reserves
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	427,489	373,710
Interest expense	117,307	91,563
Additional insurance reserves | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	427,489	373,710
Interest expense	117,307	91,563
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	(539)	(445)
Interest expense	182	131
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	(539)	(445)
Interest expense	182	131
Revenues
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	887,809	847,178
Revenues | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	427,489	373,710
Revenues | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	449,968	462,094
Revenues | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	10,352	11,374
Interest Expense
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	212,134	179,509
Interest Expense | Variable/Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	117,307	91,563
Interest Expense | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	92,508	85,937
Interest Expense | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	$ 2,319	$ 2,009