Policy Liabilities - Liability For Future Policy Benefits To Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Jan. 01, 2021
At Original Discount Rates
Deferred profit liability	$ 177,248		$ 184,451
Deferred annuity	907,797		1,027,087
Interest sensitive life	737,900		744,244
Other	9,540		8,118
Total future policy benefits	16,442,516	$ 16,306,870	15,797,099
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	18,896,574	$ 18,040,042
Deferred profit liability	177,248		184,451
Deferred annuity	907,797		1,027,087
Interest sensitive life	737,900		744,244
Other	9,540		8,118
Total future policy benefits	18,896,574		21,745,905
Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	12,251,555		11,558,107
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	14,766,577		17,171,757	$ 19,987,227
Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,358,476		2,275,092
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	2,297,512		2,610,248	2,998,631
American Income | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	4,247,758		3,916,187
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	5,169,780		6,005,498	6,875,917
American Income | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	111,096		108,693
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	126,200		143,579	162,364
Direct to Consumer | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,844,707		2,642,729
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	3,518,676		4,042,514	4,704,555
Direct to Consumer | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	961		1,004
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	1,009		1,112	1,598
Liberty National | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,206,288		2,153,030
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	2,431,415		2,830,800	3,372,114
Liberty National | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	488,546		505,319
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	532,897		620,481	740,628
Other | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,952,802		2,846,161
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	3,646,706		4,292,945
United American | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	130,992		135,891
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	136,510		169,521	213,663
Family Heritage | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	1,626,881		1,524,185
At Current Discount Rates
Net liability for future policy benefits, after other adjustments, at current discount rates	$ 1,500,896		$ 1,675,555	$ 1,880,378