Policy Liabilities - Schedule of Liability For Future Policy Benefits To Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Jan. 01, 2021
At Original Discount Rates
Deferred profit liability	$ 172,531		$ 184,680
Deferred annuity	853,064		1,015,804
Interest sensitive life	736,920		742,293
Other	9,406		8,121
Total future policy benefits	16,598,663	$ 16,306,870	15,947,814
At Current Discount Rates
Net liability for future policy benefits—long duration health	18,746,514	$ 18,040,042
Deferred profit liability	172,531		184,680
Deferred annuity	853,064		1,015,804
Interest sensitive life	736,920		742,293
Other	9,409		8,127
Total future policy benefits	18,746,514		19,105,334
Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	12,442,265		11,698,923
At Current Discount Rates
Net liability for future policy benefits—long duration health	14,698,572		14,844,463	$ 19,987,227
Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,384,477		2,297,993
At Current Discount Rates
Net liability for future policy benefits—long duration health	2,276,018		2,309,967	2,998,631
American Income | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	4,354,403		3,988,588
At Current Discount Rates
Net liability for future policy benefits—long duration health	5,195,290		5,132,796	6,875,917
American Income | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	113,981		109,318
At Current Discount Rates
Net liability for future policy benefits—long duration health	127,340		128,480	162,364
Direct to Consumer | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,892,543		2,678,413
At Current Discount Rates
Net liability for future policy benefits—long duration health	3,503,406		3,501,502	4,704,555
Direct to Consumer | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	798		993
At Current Discount Rates
Net liability for future policy benefits—long duration health	827		1,058	1,598
Liberty National | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,218,639		2,161,743
At Current Discount Rates
Net liability for future policy benefits—long duration health	2,397,886		2,488,696	3,372,114
Liberty National | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	484,458		500,950
At Current Discount Rates
Net liability for future policy benefits—long duration health	518,268		561,935	740,628
Other | Life
At Original Discount Rates
Net liability for future policy benefits—long duration life	2,976,680		2,870,179
At Current Discount Rates
Net liability for future policy benefits—long duration health	3,601,990		3,721,469
United American | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	130,624		135,532
At Current Discount Rates
Net liability for future policy benefits—long duration health	132,939		145,585	213,663
Family Heritage | Health
At Original Discount Rates
Net liability for future policy benefits—long duration life	1,654,616		1,551,200
At Current Discount Rates
Net liability for future policy benefits—long duration health	$ 1,496,644		$ 1,472,909	$ 1,880,378