Liability for Future Policy Benefits (Revenue and Interest Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Benefit Reserves | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	$ 1,833,017	$ 1,804,955	$ 1,831,360
Interest expense	382,165	373,845	363,375
Benefit Reserves | Variable / Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0	0
Interest expense	0	0	0
Benefit Reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	43,092	41,111	32,105
Interest expense	9,119	8,440	7,836
Benefit Reserves | Total
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,876,109	1,846,066	1,863,465
Interest expense	391,284	382,285	371,211
Deferred Profit Liability | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0	0
Interest expense	0	0	0
Deferred Profit Liability | Variable / Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0	0
Interest expense	0	0	0
Deferred Profit Liability | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue		3,375
Interest expense	729	552	616
Deferred Profit Liability | Total
Liability for Future Policy Benefit, Activity [Line Items]
Revenue		3,375
Interest expense	729	552	616
Deferred Profit Liability | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	(8,121)		(2,428)
Deferred Profit Liability | Total
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	(8,121)		(2,428)
Additional Insurance Reserves | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0	0
Interest expense	0	0	0
Additional Insurance Reserves | Variable / Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	2,050,441	1,405,696	1,367,796
Interest expense	536,678	486,253	433,631
Additional Insurance Reserves | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	0	0	0
Interest expense	0	0	0
Additional Insurance Reserves | Total
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	2,050,441	1,405,696	1,367,796
Interest expense	536,678	486,253	433,631
Revenues | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	1,833,017	1,804,955	1,831,360
Revenues | Variable / Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	2,050,441	1,405,696	1,367,796
Revenues | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	34,971	44,486	29,677
Revenues | Total
Liability for Future Policy Benefit, Activity [Line Items]
Revenue	3,918,429	3,255,137	3,228,833
Interest Expense | Term Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	382,165	373,845	363,375
Interest Expense | Variable / Universal Life
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	536,678	486,253	433,631
Interest Expense | Fixed Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	9,848	8,992	8,452
Interest Expense | Total
Liability for Future Policy Benefit, Activity [Line Items]
Interest expense	$ 928,691	$ 869,090	$ 805,458