Policy Liabilities - Undiscounted And Discounted Expected Future Gross Premiums And Expected Future Benefits And Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Life
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	$ 21,259,261		$ 20,470,339
At original discount rates	11,564,309	$ 11,442,919	11,102,451	$ 10,896,222
At current discount rates	12,189,326	11,748,528	13,094,222	14,082,538
Not discounted	48,772,838		47,438,131
At original discount rates	26,738,983		25,914,319
At current discount rates	28,144,330		30,527,534
Not discounted	75,455,738		72,598,809
At original discount rates	23,849,467	23,564,337	22,696,519	22,374,930
At current discount rates	26,987,682	25,749,961	30,317,214	33,664,308
Health
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	8,710,288		8,661,494
At original discount rates	5,387,168	5,366,304	5,336,742	5,328,427
At current discount rates	5,374,493	5,207,422	5,908,639	6,418,018
Not discounted	17,390,362		16,782,047
At original discount rates	10,618,931		10,247,273
At current discount rates	10,652,514		11,415,764
Not discounted	13,594,299		13,399,750
At original discount rates	7,748,360	7,710,767	7,618,065	7,587,083
At current discount rates	7,670,753	7,394,349	8,526,214	9,353,001
American Income | Life
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	7,617,532		7,115,131
At original discount rates	4,325,957	4,246,723	4,043,480	3,906,098
At current discount rates	4,467,637	4,273,156	4,646,747	4,925,192
Not discounted	23,041,514		21,851,854
At original discount rates	13,054,486		12,374,587
At current discount rates	13,575,751		14,324,455
Not discounted	28,821,998		26,930,450
At original discount rates	8,573,734	8,409,761	7,959,694	7,744,201
At current discount rates	9,637,463	9,119,104	10,652,256	11,773,519
American Income | Health
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	351,655		323,828
At original discount rates	197,446	192,631	183,679	178,801
At current discount rates	200,666	190,296	208,064	222,553
Not discounted	1,760,671		1,723,857
At original discount rates	984,216		963,321
At current discount rates	1,037,339		1,130,227
Not discounted	626,151		599,187
At original discount rates	308,170	303,713	292,356	285,604
At current discount rates	326,533	312,750	351,631	380,915
Direct to Consumer | Life
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	10,832,386		10,630,110
At original discount rates	5,718,900	5,680,864	5,595,772	5,533,741
At current discount rates	6,110,550	5,910,224	6,710,655	7,264,905
Not discounted	17,479,516		17,414,120
At original discount rates	9,165,113		9,103,648
At current discount rates	9,773,835		10,912,941
Not discounted	25,582,750		24,876,834
At original discount rates	8,563,604	8,477,892	8,238,501	8,157,259
At current discount rates	9,624,680	9,225,451	10,750,349	11,859,408
Direct to Consumer | Health
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	131,187		148,614
At original discount rates	85,966	87,751	94,408	96,776
At current discount rates	90,243	90,143	109,734	121,724
Not discounted	171,266		204,317
At original discount rates	112,442		130,162
At current discount rates	118,105		151,140
Not discounted	124,597		143,711
At original discount rates	83,001	85,212	92,272	95,628
At current discount rates	87,090	87,532	107,034	119,888
Liberty National | Life
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	1,889,419		1,855,371
At original discount rates	1,070,775	1,066,123	1,043,765	1,040,242
At current discount rates	1,128,083	1,094,407	1,224,988	1,332,469
Not discounted	4,453,139		4,265,146
At original discount rates	2,599,082		2,485,460
At current discount rates	2,667,795		2,848,626
Not discounted	8,658,766		8,514,395
At original discount rates	3,284,594	3,272,980	3,208,055	3,206,164
At current discount rates	3,559,012	3,429,256	4,066,234	4,542,697
Liberty National | Health
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	634,061		641,225
At original discount rates	404,647	415,442	401,751	414,409
At current discount rates	421,447	423,490	463,452	517,368
Not discounted	2,232,290		2,174,779
At original discount rates	1,396,334		1,356,873
At current discount rates	1,468,763		1,577,158
Not discounted	1,575,745		1,594,836
At original discount rates	890,019	904,865	905,739	921,608
At current discount rates	949,996	941,574	1,082,425	1,201,317
Other | Life
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	919,924		869,727
At original discount rates	448,677	449,209	419,434	416,141
At current discount rates	483,056	470,741	511,832	559,972
Not discounted	3,798,669		3,907,011
At original discount rates	1,920,302		1,950,624
At current discount rates	2,126,949		2,441,512
Not discounted	12,392,224		12,277,130
At original discount rates	3,427,535	3,403,704	3,290,269	3,267,306
At current discount rates	4,166,527	3,976,150	4,848,375	5,488,684
United American | Health
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	4,685,306		4,763,592
At original discount rates	2,948,641	2,941,261	2,957,769	2,949,851
At current discount rates	2,997,723	2,908,501	3,337,152	3,611,659
Not discounted	6,783,819		6,781,444
At original discount rates	4,279,547		4,226,705
At current discount rates	4,346,007		4,765,664
Not discounted	4,909,212		5,057,861
At original discount rates	3,079,790	3,080,633	3,095,417	3,090,901
At current discount rates	3,132,462	3,046,829	3,508,485	3,810,559
Family Heritage | Health
Liability for Future Policy Benefit, Activity [Line Items]
Not discounted	2,908,079		2,784,235
At original discount rates	1,750,468	1,729,219	1,699,135	1,688,590
At current discount rates	1,664,414	1,594,992	1,790,237	1,944,714
Not discounted	6,442,316		5,897,650
At original discount rates	3,846,392		3,570,212
At current discount rates	3,682,300		3,791,575
Not discounted	6,358,594		6,004,155
At original discount rates	3,387,380	3,336,344	3,232,281	3,193,342
At current discount rates	$ 3,174,672	$ 3,005,664	$ 3,476,639	$ 3,840,322