Business Segments - Schedule of Segment Premium Income by Distribution Channel (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2025 USD ($)	Dec. 31, 2024 segment	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($) segment
Segment Reporting [Abstract]
Number of segments | segment		3		3	4
Percentage of revenue		1.00%
Segment Reporting Information [Line Items]
Premium	$ 1,231,007		$ 1,172,593	$ 3,648,304	$ 3,485,002
% of Total	100.00%		100.00%	100.00%	100.00%
American Income
Segment Reporting Information [Line Items]
Premium	$ 482,907		$ 459,116	$ 1,428,397	$ 1,357,912
% of Total	39.00%		39.00%	39.00%	39.00%
Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 264,014		$ 264,497	$ 794,025	$ 797,374
% of Total	21.00%		23.00%	22.00%	23.00%
Liberty National
Segment Reporting Information [Line Items]
Premium	$ 145,460		$ 140,902	$ 434,458	$ 419,211
% of Total	12.00%		12.00%	12.00%	12.00%
United American
Segment Reporting Information [Line Items]
Premium	$ 171,277		$ 151,118	$ 498,265	$ 445,384
% of Total	14.00%		13.00%	14.00%	13.00%
Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 120,536		$ 109,503	$ 352,268	$ 322,010
% of Total	10.00%		9.00%	9.00%	9.00%
Other
Segment Reporting Information [Line Items]
Premium	$ 46,813		$ 47,457	$ 140,891	$ 143,111
% of Total	4.00%		4.00%	4.00%	4.00%
Life
Segment Reporting Information [Line Items]
Premium	$ 844,483		$ 818,638	$ 2,513,890	$ 2,438,385
% of Total	100.00%		100.00%	100.00%	100.00%
Life | American Income
Segment Reporting Information [Line Items]
Premium	$ 451,214		$ 427,839	$ 1,334,591	$ 1,265,417
% of Total	53.00%		52.00%	53.00%	52.00%
Life | Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 244,828		$ 246,425	$ 736,651	$ 743,304
% of Total	29.00%		30.00%	29.00%	31.00%
Life | Liberty National
Segment Reporting Information [Line Items]
Premium	$ 98,190		$ 93,625	$ 291,635	$ 276,599
% of Total	12.00%		12.00%	12.00%	11.00%
Life | United American
Segment Reporting Information [Line Items]
Premium	$ 1,542		$ 1,608	$ 4,704	$ 5,009
% of Total	0.00%		0.00%	0.00%	0.00%
Life | Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 1,896		$ 1,684	$ 5,418	$ 4,945
% of Total	0.00%		0.00%	0.00%	0.00%
Life | Other
Segment Reporting Information [Line Items]
Premium	$ 46,813		$ 47,457	$ 140,891	$ 143,111
% of Total	6.00%		6.00%	6.00%	6.00%
Health
Segment Reporting Information [Line Items]
Premium	$ 386,524		$ 353,955	$ 1,134,414	$ 1,046,617
% of Total	100.00%		100.00%	100.00%	100.00%
Health | American Income
Segment Reporting Information [Line Items]
Premium	$ 31,693		$ 31,277	$ 93,806	$ 92,495
% of Total	8.00%		9.00%	8.00%	9.00%
Health | Direct to Consumer
Segment Reporting Information [Line Items]
Premium	$ 19,186		$ 18,072	$ 57,374	$ 54,070
% of Total	5.00%		5.00%	5.00%	5.00%
Health | Liberty National
Segment Reporting Information [Line Items]
Premium	$ 47,270		$ 47,277	$ 142,823	$ 142,612
% of Total	12.00%		13.00%	13.00%	14.00%
Health | United American
Segment Reporting Information [Line Items]
Premium	$ 169,735		$ 149,510	$ 493,561	$ 440,375
% of Total	44.00%		42.00%	43.00%	42.00%
Health | Family Heritage
Segment Reporting Information [Line Items]
Premium	$ 118,640		$ 107,819	$ 346,850	$ 317,065
% of Total	31.00%		31.00%	31.00%	30.00%
Health | Other
Segment Reporting Information [Line Items]
Premium	$ 0		$ 0	$ 0	$ 0
% of Total	0.00%		0.00%	0.00%	0.00%