Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)
Segment Reporting [Abstract]
Number of segments | segment			4
Segment Reporting Information [Line Items]
Revenue	$ 1,110,920	$ 1,077,199	$ 2,206,010	$ 2,142,011
% of Total	100.00%	100.00%	100.00%	100.00%
Life
Segment Reporting Information [Line Items]
Revenue	$ 781,733	$ 756,892	$ 1,554,330	$ 1,506,020
% of Total	100.00%	100.00%	100.00%	100.00%
Health
Segment Reporting Information [Line Items]
Revenue	$ 329,187	$ 320,307	$ 651,680	$ 635,991
% of Total	100.00%	100.00%	100.00%	100.00%
Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
American Income
Segment Reporting Information [Line Items]
Revenue	$ 424,147	$ 405,159	$ 841,253	$ 804,031
% of Total	38.00%	38.00%	38.00%	37.00%
American Income | Life
Segment Reporting Information [Line Items]
Revenue	$ 394,620	$ 375,748	$ 782,132	$ 745,854
% of Total	51.00%	50.00%	51.00%	49.00%
American Income | Health
Segment Reporting Information [Line Items]
Revenue	$ 29,527	$ 29,411	$ 59,121	$ 58,177
% of Total	9.00%	9.00%	9.00%	9.00%
American Income | Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Revenue	$ 265,782	$ 265,112	$ 530,697	$ 528,772
% of Total	24.00%	25.00%	24.00%	25.00%
Direct to Consumer | Life
Segment Reporting Information [Line Items]
Revenue	$ 248,607	$ 247,264	$ 496,274	$ 492,996
% of Total	32.00%	33.00%	32.00%	33.00%
Direct to Consumer | Health
Segment Reporting Information [Line Items]
Revenue	$ 17,175	$ 17,848	$ 34,423	$ 35,776
% of Total	5.00%	6.00%	5.00%	6.00%
Direct to Consumer | Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Liberty National
Segment Reporting Information [Line Items]
Revenue	$ 133,537	$ 128,162	$ 265,712	$ 256,482
% of Total	12.00%	12.00%	12.00%	12.00%
Liberty National | Life
Segment Reporting Information [Line Items]
Revenue	$ 86,634	$ 81,316	$ 171,837	$ 161,876
% of Total	11.00%	11.00%	11.00%	11.00%
Liberty National | Health
Segment Reporting Information [Line Items]
Revenue	$ 46,903	$ 46,846	$ 93,875	$ 94,606
% of Total	14.00%	15.00%	14.00%	15.00%
Liberty National | Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
United American
Segment Reporting Information [Line Items]
Revenue	$ 139,302	$ 137,447	$ 273,791	$ 271,211
% of Total	13.00%	13.00%	12.00%	13.00%
United American | Life
Segment Reporting Information [Line Items]
Revenue	$ 1,849	$ 2,003	$ 3,731	$ 4,077
% of Total	0.00%	0.00%	0.00%	0.00%
United American | Health
Segment Reporting Information [Line Items]
Revenue	$ 137,453	$ 135,444	$ 270,060	$ 267,134
% of Total	42.00%	42.00%	42.00%	42.00%
United American | Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Family Heritage
Segment Reporting Information [Line Items]
Revenue	$ 99,642	$ 92,131	$ 197,194	$ 183,030
% of Total	9.00%	8.00%	9.00%	8.00%
Family Heritage | Life
Segment Reporting Information [Line Items]
Revenue	$ 1,513	$ 1,373	$ 2,993	$ 2,732
% of Total	0.00%	0.00%	0.00%	0.00%
Family Heritage | Health
Segment Reporting Information [Line Items]
Revenue	$ 98,129	$ 90,758	$ 194,201	$ 180,298
% of Total	30.00%	28.00%	30.00%	28.00%
Family Heritage | Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Other
Segment Reporting Information [Line Items]
Revenue	$ 48,510	$ 49,188	$ 97,363	$ 98,485
% of Total	4.00%	4.00%	5.00%	5.00%
Other | Life
Segment Reporting Information [Line Items]
Revenue	$ 48,510	$ 49,188	$ 97,363	$ 98,485
% of Total	6.00%	6.00%	6.00%	7.00%
Other | Health
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Other | Annuity
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%