Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 30, 2023 USD ($)
Segment Reporting [Abstract]
Number of segments | segment			4
Segment Reporting Information [Line Items]
Premium	$ 1,167,125	$ 1,110,920	$ 2,312,409	$ 2,206,010
% of Total	100.00%	100.00%	100.00%	100.00%
Life
Segment Reporting Information [Line Items]
Premium	$ 815,482	$ 781,733	$ 1,619,747	$ 1,554,330
% of Total	100.00%	100.00%	100.00%	100.00%
Health
Segment Reporting Information [Line Items]
Premium	$ 351,643	$ 329,187	$ 692,662	$ 651,680
% of Total	100.00%	100.00%	100.00%	100.00%
Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
American Income
Segment Reporting Information [Line Items]
Premium	$ 454,255	$ 424,147	$ 898,796	$ 841,253
% of Total	39.00%	38.00%	39.00%	38.00%
American Income | Life
Segment Reporting Information [Line Items]
Premium	$ 423,534	$ 394,620	$ 837,578	$ 782,132
% of Total	52.00%	51.00%	52.00%	51.00%
American Income | Health
Segment Reporting Information [Line Items]
Premium	$ 30,721	$ 29,527	$ 61,218	$ 59,121
% of Total	9.00%	9.00%	9.00%	9.00%
American Income | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 266,971	$ 265,782	$ 532,877	$ 530,697
% of Total	23.00%	24.00%	23.00%	24.00%
Direct to Consumer | Life
Segment Reporting Information [Line Items]
Premium	$ 248,839	$ 248,607	$ 496,879	$ 496,274
% of Total	31.00%	32.00%	31.00%	32.00%
Direct to Consumer | Health
Segment Reporting Information [Line Items]
Premium	$ 18,132	$ 17,175	$ 35,998	$ 34,423
% of Total	5.00%	5.00%	5.00%	5.00%
Direct to Consumer | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Liberty National
Segment Reporting Information [Line Items]
Premium	$ 139,902	$ 133,537	$ 278,309	$ 265,712
% of Total	12.00%	12.00%	12.00%	12.00%
Liberty National | Life
Segment Reporting Information [Line Items]
Premium	$ 92,197	$ 86,634	$ 182,974	$ 171,837
% of Total	11.00%	11.00%	11.00%	11.00%
Liberty National | Health
Segment Reporting Information [Line Items]
Premium	$ 47,705	$ 46,903	$ 95,335	$ 93,875
% of Total	14.00%	14.00%	14.00%	14.00%
Liberty National | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
United American
Segment Reporting Information [Line Items]
Premium	$ 150,788	$ 139,302	$ 294,266	$ 273,791
% of Total	13.00%	13.00%	13.00%	12.00%
United American | Life
Segment Reporting Information [Line Items]
Premium	$ 1,558	$ 1,849	$ 3,401	$ 3,731
% of Total	0.00%	0.00%	0.00%	0.00%
United American | Health
Segment Reporting Information [Line Items]
Premium	$ 149,230	$ 137,453	$ 290,865	$ 270,060
% of Total	42.00%	42.00%	42.00%	42.00%
United American | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 107,500	$ 99,642	$ 212,507	$ 197,194
% of Total	9.00%	9.00%	9.00%	9.00%
Family Heritage | Life
Segment Reporting Information [Line Items]
Premium	$ 1,645	$ 1,513	$ 3,261	$ 2,993
% of Total	0.00%	0.00%	0.00%	0.00%
Family Heritage | Health
Segment Reporting Information [Line Items]
Premium	$ 105,855	$ 98,129	$ 209,246	$ 194,201
% of Total	30.00%	30.00%	30.00%	30.00%
Family Heritage | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Other
Segment Reporting Information [Line Items]
Premium	$ 47,709	$ 48,510	$ 95,654	$ 97,363
% of Total	4.00%	4.00%	4.00%	5.00%
Other | Life
Segment Reporting Information [Line Items]
Premium	$ 47,709	$ 48,510	$ 95,654	$ 97,363
% of Total	6.00%	6.00%	6.00%	6.00%
Other | Health
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%
Other | Annuity
Segment Reporting Information [Line Items]
Premium	$ 0	$ 0	$ 0	$ 0
% of Total	0.00%	0.00%	0.00%	0.00%