Policy Liabilities - Schedule of Liability For Future Policy Benefits To Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
At Original Discount Rates
Deferred profit liability	$ 179,229		$ 174,605
Deferred annuity	636,219		739,019
Interest sensitive life	720,269		729,721
Other	8,922		9,810
Total future policy benefits	17,719,841		17,110,880
At Current Discount Rates
Deferred profit liability	179,229		174,605
Deferred annuity	636,219		739,019
Interest sensitive life	720,269		729,721
Other	8,915		9,805
Net liability for future policy benefits—long duration health	18,756,844	$ 18,457,263	18,882,023
Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	13,625,309		13,001,552
At Current Discount Rates
Net liability for future policy benefits—long duration health	14,850,854		14,906,973
Net liability for future policy benefits—long duration health	14,850,854		14,906,973
Life | American Income
At Original Discount Rates
Net liability for future policy benefits—long duration life	4,951,442		4,620,358
At Current Discount Rates
Net liability for future policy benefits—long duration health	5,356,076		5,305,709
Net liability for future policy benefits—long duration health	5,356,076		5,305,709
Life | Direct to Consumer
At Original Discount Rates
Net liability for future policy benefits—long duration life	3,197,663		3,030,353
At Current Discount Rates
Net liability for future policy benefits—long duration health	3,567,833		3,558,505
Net liability for future policy benefits—long duration health	3,567,833		3,558,505
Life | Liberty National
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,302,287		2,265,329
At Current Discount Rates
Net liability for future policy benefits—long duration health	2,357,161		2,402,951
Net liability for future policy benefits—long duration health	2,357,161		2,402,951
Life | Other premium
At Original Discount Rates
Net liability for future policy benefits—long duration life	3,173,917		3,085,512
At Current Discount Rates
Net liability for future policy benefits—long duration health	3,569,784		3,639,808
Net liability for future policy benefits—long duration health	3,569,784		3,639,808
Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,549,893		2,456,173
At Current Discount Rates
Net liability for future policy benefits—long duration health	2,361,358		2,321,900
Net liability for future policy benefits—long duration health	2,361,358		2,321,900
Health | American Income
At Original Discount Rates
Net liability for future policy benefits—long duration life	126,186		114,146
At Current Discount Rates
Net liability for future policy benefits—long duration health	135,966		125,737
Net liability for future policy benefits—long duration health	135,966		125,737
Health | Direct to Consumer
At Original Discount Rates
Net liability for future policy benefits—long duration life	722		707
At Current Discount Rates
Net liability for future policy benefits—long duration health	755		734
Net liability for future policy benefits—long duration health	755		734
Health | Liberty National
At Original Discount Rates
Net liability for future policy benefits—long duration life	458,182		472,140
At Current Discount Rates
Net liability for future policy benefits—long duration health	477,872		499,819
Net liability for future policy benefits—long duration health	477,872		499,819
Health | United American
At Original Discount Rates
Net liability for future policy benefits—long duration life	92,197		117,042
At Current Discount Rates
Net liability for future policy benefits—long duration health	92,199		117,588
Net liability for future policy benefits—long duration health	92,199		117,588
Health | Family Heritage
At Original Discount Rates
Net liability for future policy benefits—long duration life	1,872,606		1,752,138
At Current Discount Rates
Net liability for future policy benefits—long duration health	1,654,566		1,578,022
Net liability for future policy benefits—long duration health	$ 1,654,566		$ 1,578,022